OE Match

Clutch Release Lever 

Restore smooth and precise clutch operation with this OE Match Clutch Release Lever, specifically for Porsche 944 turbo (951) models produced between 1985 and 1991. As a critical component within the clutch actuation system, the release lever transfers movement from the clutch release mechanism to the release bearing, allowing the clutch to disengage correctly during gear changes.

Fits:

• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91

Diagram ref no 14

Manufactured to OE specifications, this replacement clutch release lever delivers the correct geometry, strength and durability required for the high-performance drivetrain of the Porsche 944 Turbo. Whether you're carrying out a clutch replacement, gearbox rebuild or complete drivetrain restoration, replacing worn clutch mechanism components helps ensure smooth operation and long-term reliability.

What Does the Clutch Release Lever Do?

The clutch release lever, often referred to as a clutch fork or release arm, plays a vital role within the Porsche 944 Turbo clutch system.

When the clutch pedal is pressed, hydraulic pressure operates the clutch release mechanism. The release lever then transfers this force to the release bearing, which disengages the clutch pressure plate from the clutch disc, allowing smooth gear changes without transmitting engine power to the transmission.

The clutch release lever helps:

• Transfer force from the clutch actuation system.
• Operate the clutch release bearing.
• Enable smooth gear engagement and shifting.
• Ensure consistent clutch pedal feel.
• Support efficient clutch disengagement and engagement.
• Maintain proper clutch system geometry.

Without a properly functioning release lever, clutch operation can become inconsistent, difficult or completely ineffective.

Why Do Clutch Release Levers Fail?

Although manufactured from durable steel, clutch release levers are subjected to constant mechanical loads throughout their service life. Over time, wear and fatigue can develop.

Common causes of failure include:

• Wear at pivot and contact points.
• Fatigue from repeated clutch operation.
• Excessive load caused by heavy clutch assemblies.
• Distortion resulting from clutch system failure.
• Corrosion from age and environmental exposure.
• Poor lubrication of moving components.
• Wear caused by damaged release bearings or guide tubes.

As Porsche 944 turbo models continue to age, original clutch mechanism components may show significant wear even if the clutch itself has been replaced previously.

When Should the Clutch Release Lever Be Replaced?

The clutch release lever should be inspected whenever the transmission is removed or clutch components are serviced. Replacement is recommended if you notice:

• Excessive wear at pivot points.
• Grooving or damage where the release bearing contacts the lever.
• Cracks or distortion.
• Inconsistent clutch pedal feel.
• Difficulty engaging gears.
• Unusual clutch noises.
• During clutch replacement when wear is evident.

Because access requires significant labour, many Porsche specialists recommend replacing the release lever during clutch overhauls to avoid future transmission removal costs.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95111608501

The product you are viewing cross references to these numbers

Flywheel Ring Gear 

Restore dependable starting performance to your classic Porsche 911 Turbo with this OE Match Flywheel Ring Gear. Designed for Porsche 911 turbo (930) models produced between 1978 and 1989, this precision-engineered ring gear provides the critical interface between the starter motor and flywheel, ensuring reliable engine cranking and smooth engagement during every start-up.

Fits:

• Porsche 911 1978-1989 3.3L Turbo (930)       

Manufactured to OE specifications, this replacement ring gear is engineered to deliver exceptional durability and precise fitment for the demanding requirements of the turbocharged air-cooled flat-six engine. Whether you're rebuilding a transmission, replacing a worn flywheel component or carrying out a full engine restoration, this OE Match ring gear helps maintain reliable starting performance and long-term drivetrain integrity.

Technical Specifications

• Number of Teeth: 135
• Internal Diameter: 230mm
• External Diameter: 280mm

Quality Precision Machined Gear Teeth for Correct Starter Engagement

What Does the Flywheel Ring Gear Do?

The flywheel ring gear is mounted around the outer edge of the flywheel and serves as the engagement point for the starter motor pinion gear.

When the ignition is activated, the starter motor extends its pinion gear into the teeth of the flywheel ring gear. The starter then rotates the flywheel, which in turn rotates the crankshaft and starts the engine.

The flywheel ring gear performs several essential functions:

• Transfers rotational force from the starter motor to the engine.
• Allows the engine to crank during start-up.
• Provides precise engagement with the starter pinion gear.
• Supports smooth and reliable engine starting.
• Helps prevent starter slippage and gear damage.

On the turbocharged Porsche 930, where higher compression and engine loads place greater demands on the starting system, proper ring gear condition is especially important.

Why Do Flywheel Ring Gears Fail?

Although manufactured from hardened steel, flywheel ring gears endure repeated mechanical stress throughout their service life. Every engine start places load on the gear teeth, eventually leading to wear and damage.

Common causes of flywheel ring gear failure include:

• Tooth wear from repeated starter engagement.
• Chipped, cracked or broken gear teeth.
• Worn starter motor pinion gears.
• Starter motor misalignment.
• Corrosion caused by moisture exposure.
• Excessive heat from clutch or flywheel issues.
• High mileage and decades of use.

Many Porsche 930 models have now accumulated decades of service, making flywheel and starter system inspections increasingly important during restoration and maintenance work.

When Should the Flywheel Ring Gear Be Replaced?

The ring gear should be inspected whenever the clutch, transmission or engine assembly is removed. Replacement is recommended if any of the following are found:

• Worn or rounded gear teeth.
• Broken or chipped teeth.
• Starter grinding noises.
• Intermittent starter engagement.
• Difficulty cranking the engine.
• Visible corrosion or physical damage.
• Excessive wear concentrated in specific areas of the gear.

Because replacement requires flywheel removal, many specialists recommend fitting a new ring gear during clutch replacement or major drivetrain refurbishment when access is readily available.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93011623003

The product you are viewing cross references to these numbers

Flywheel Ring Gear 

Restore dependable engine starting performance with this OE Match Flywheel Ring Gear, designed for Porsche 911 models produced between 1970 and 1986. The flywheel ring gear is a critical component of the engine starting system, providing the engagement surface for the starter motor and allowing the engine to crank reliably every time the ignition is activated.

Fits:

• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1975-1977 3.0L Turbo (930)

Manufactured to OE specifications, this replacement ring gear delivers the correct tooth profile, fitment and durability required for classic air-cooled Porsche applications. Whether you're rebuilding an engine, replacing a worn flywheel component or restoring a classic 911, fitting a new flywheel ring gear helps ensure smooth starter operation and long-term reliability.

What Does the Flywheel Ring Gear Do?

The flywheel ring gear is a hardened steel gear mounted around the outer circumference of the flywheel. Its primary purpose is to engage with the starter motor pinion gear during engine start-up.

When the ignition key is turned, the starter motor extends its pinion gear into the teeth of the flywheel ring gear. The starter then rotates the flywheel, turning the engine over until combustion begins and the engine starts.

The flywheel ring gear plays a vital role by:

• Providing a durable engagement surface for the starter motor.
• Allowing the engine to crank during start-up.
• Ensuring smooth and reliable starter operation.
• Transferring rotational force from the starter motor to the crankshaft.
• Supporting consistent engine starting performance.

Without a properly functioning ring gear, starter engagement can become unreliable or impossible.

Why Do Flywheel Ring Gears Fail?

Although manufactured from hardened steel, flywheel ring gears experience repeated mechanical loading every time the vehicle is started. Over decades of service, wear and damage can occur.

Common causes of failure include:

• Tooth wear caused by repeated starter engagement.
• Damaged or chipped gear teeth.
• Starter motor misalignment.
• Worn starter pinion gears damaging the ring gear.
• Excessive heat generated during clutch or flywheel issues.
• Corrosion caused by moisture contamination.
• General wear associated with high mileage and age.

On classic Porsche 911 models, decades of repeated engine starts can eventually lead to worn sections of the ring gear, particularly in the areas where the engine most commonly stops after shutdown.

When Should the Flywheel Ring Gear Be Replaced?

The flywheel ring gear should be inspected whenever the engine, clutch or flywheel assembly is removed. Replacement is recommended if you observe:
Chipped, broken or heavily worn teeth.

• Starter grinding noises during engine start.
• Intermittent starter engagement problems.
• Difficulty cranking the engine.
• Visible corrosion or damage.
• Excessive wear around frequently engaged sections of the gear.
• During clutch replacement or engine rebuild projects when wear is evident.

Replacing a worn ring gear while the transmission or engine is already removed can prevent future starting problems and reduce labour costs.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91111623904

The product you are viewing cross references to these numbers

Ring Gear.
The OE Match Ring Gear is a high-quality replacement drivetrain component designed to work as part of the engine starting system. Manufactured to OE specifications for fit, strength and durability, the ring gear is mounted to the flywheel or flexplate and provides the engagement surface for the starter motor pinion gear during engine start-up. 

Fits: 

• Porsche 911 1987-1989 3.2L G50
• Porsche 964 (911) C4 1989-93  

Precision-machined from hardened steel, the ring gear is engineered to withstand repeated engagement loads and high torque forces generated during engine cranking. Accurate tooth geometry ensures smooth starter engagement, reliable engine starting and long service life under demanding operating conditions.  

What This Product Does:

• Provides the engagement surface for the starter motor pinion gear.
• Transfers rotational force from the starter motor to the engine.
• Enables reliable engine cranking and starting.
• Works in conjunction with the flywheel or flexplate assembly.
• Ensures smooth engagement during start-up.
• Supports consistent operation of the starting system.
• Contributes to dependable vehicle reliability.

Symptoms Of Wear Or Failure:

• Grinding noises during engine starting.
• Starter motor spinning without turning the engine.
• Intermittent starting problems.
• Clicking noises during starter engagement.
• Starter motor slipping during cranking.
• Visible chipped, worn or missing teeth on inspection.
• Engine only starting when stopped in certain positions.
• Premature wear of the starter motor pinion gear.

Why Replacement Matters:

• The ring gear is subjected to repeated high-torque engagement every time the engine is started. Over time, the teeth can become worn, chipped, rounded or damaged, particularly in vehicles with high mileage or faulty starter motors. Excessive wear can prevent the starter pinion from engaging correctly, resulting in unreliable starting performance.
• A damaged ring gear can place additional strain on the starter motor, accelerating wear of both components and potentially leading to complete starting system failure. If left unresolved, the vehicle may become difficult or impossible to start, resulting in inconvenience and costly repairs.
• Replacing a worn ring gear restores proper starter engagement, improves starting reliability and helps protect the starter motor from unnecessary wear. An OE Match replacement provides factory-style fitment, precision machining and long-term durability, ensuring dependable starting performance and preserving the reliability of your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95011614305

The product you are viewing cross references to these numbers

Clutch Slave Cylinder.
The OE Match Clutch Slave Cylinder is a high-quality replacement hydraulic clutch component designed to convert hydraulic pressure from the clutch master cylinder into mechanical movement to operate the clutch release mechanism. Manufactured to OE specifications for fit, performance and durability, this component plays a critical role in ensuring smooth clutch operation and reliable gear changes.  

Fits:

• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97  

Constructed from precision-machined materials with high-quality seals and internal components, the clutch slave cylinder is designed to withstand repeated hydraulic pressure cycles, temperature variations and demanding driving conditions. It ensures consistent clutch pedal feel and accurate clutch disengagement for optimum transmission performance.  

What This Product Does:

• Converts hydraulic pressure into clutch release movement.
• Operates the clutch release fork or release bearing assembly.
• Enables smooth clutch disengagement during gear changes.
• Helps maintain consistent clutch pedal feel.
• Supports accurate and reliable gear selection.
• Reduces drivetrain shock during shifting.
• Contributes to smooth transmission operation and driving comfort.

Symptoms Of Wear Or Failure:

• Soft, spongy or inconsistent clutch pedal feel.
• Difficulty selecting gears.
• Clutch pedal sticking to the floor.
• Incomplete clutch disengagement.
• Hydraulic fluid leaks around the slave cylinder.
• Visible fluid loss from the clutch hydraulic system.
• Reduced clutch performance.
• Grinding noises during gear changes.
• Low clutch fluid level in the reservoir.
• Complete loss of clutch operation in severe failure cases.

Why Replacement Matters:

• The clutch slave cylinder operates every time the clutch pedal is pressed and is continuously exposed to hydraulic pressure, temperature fluctuations and seal wear. Over time, internal seals can deteriorate, allowing hydraulic fluid to leak internally or externally, reducing the cylinder's ability to generate the force required to disengage the clutch properly.
• A failing slave cylinder can make gear selection difficult, accelerate clutch and gearbox wear, and eventually leave the vehicle unable to disengage the clutch. In severe cases, complete hydraulic failure can result in loss of clutch function and vehicle immobility.
• Replacing a worn clutch slave cylinder restores proper hydraulic operation, improves clutch feel and ensures smooth gear engagement. An OE Match replacement provides factory-style fitment, dependable sealing performance and long-term durability, helping maintain the performance, reliability and driving characteristics expected from your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95011623712

The product you are viewing cross references to these numbers

Synchro Shifting Sleeve 1st/2nd Gear. 
The OE Match Synchro Shifting Sleeve, 1st/2nd Gear is a high-quality replacement transmission component designed to facilitate the engagement of first and second gears within Porsche manual gearboxes. Manufactured to OE specifications for fit, precision and durability, this shifting sleeve forms a critical part of the synchroniser assembly, ensuring smooth, accurate and reliable gear selection.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 42

Working in conjunction with the synchroniser hub, synchro rings and dog teeth, the shifting sleeve slides across the synchroniser assembly to engage the selected gear once rotational speeds have been synchronised. Precision machining and correct fitment are essential for maintaining shift quality, reducing gearbox wear and ensuring dependable transmission performance.  

What This Product Does:

• Engages first and second gears within the gearbox.
• Works with the synchroniser assembly to enable smooth gear changes
• Transfers movement from the gear selector mechanism to the selected gear.
• Helps ensure accurate and positive gear engagement.
• Supports proper synchronisation before gear selection.
• Reduces gear clash and transmission wear.
• Contributes to smooth manual gearbox operation and drivability.

Symptoms Of Wear Or Failure:

• Difficulty engaging first or second gear.
• Gear grinding or crunching during shifts.
• Notchy or inconsistent gear changes.
• Excessive resistance when moving the gear lever.
• Gear disengagement or jumping out of gear under load.
• Poor shift quality and reduced transmission precision.
• Increased gearbox noise during gear changes.
• Visible wear, chipping or rounding of engagement surfaces during inspection.

Why Replacement Matters:

• The synchro shifting sleeve experiences repeated mechanical loading every time first or second gear is selected. Over time, the engagement surfaces can wear, become rounded or suffer damage, reducing the sleeve's ability to engage gears cleanly and securely.
• A worn shifting sleeve can compromise gear engagement, place additional strain on synchroniser rings and dog teeth, and accelerate wear throughout the gearbox. If left unresolved, continued operation may lead to increasingly poor shift quality and more extensive transmission repairs.
• Replacing a worn synchro shifting sleeve restores accurate gear engagement, improves transmission performance and helps protect other synchroniser components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring smooth and reliable shifting performance for your Porsche manual transmission.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93030241103

The product you are viewing cross references to these numbers

Synchro Thrust Block 1st/2nd Gear.
Supports the synchroniser and gear assembly within the gearbox, particularly relating to first and second gear. It is manufactured as a direct-fit component designed to replicate the form, fit, and function of the factory part.
Sold each, 2 required per gearbox

Fits:
Porsche 911 1974 - 1986 (915 Gearbox)

Diagram ref no 44.

Inside the 915 manual gearbox, the thrust block plays a critical role in maintaining correct alignment and support for the synchroniser assembly, particularly between first and second gears. It helps maintain correct spacing and load distribution on internal transmission components, ensuring consistent gear engagement and smooth shifts.

By accurately positioning and supporting the gears and synchronisers, this thrust block helps reduce internal wear and supports reliable transmission operation - especially under spirited driving conditions common in performance Porsche use.

Transmission internals operate under high rotational and axial loads, meaning even small variations in spacing or fit can lead to friction, wear, or mis-engagement. A worn or poorly fitting thrust block can cause:
• Gear engagement issues
• Increased synchroniser or gear wear
• Rough or imprecise shifting
• Premature transmission component failure.

Replace this transmission thrust block if you are:
• Performing a full gearbox rebuild
• Noticing rough or imprecise shifting in first/second gear
• Reassembling a gearbox with worn internal components
• Addressing synchroniser wear or axial play

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91530231502

The product you are viewing cross references to these numbers

Synchro Brake Band 3rd / 4th / 5th gear
This OE Match synchro brake band is a replacement transmission synchroniser component used on Porsche 911 models fitted with the 915 gearbox. It is designed for the 3rd, 4th, and 5th gear synchroniser assembly and matches the original-style fit and function.
3 per gearbox. *please note: these are 1/2 pieces so order 2 pcs to make one complete brake band

Fits:
Porsche 911 1974 - 1986 (915 Gearbox)

Diagram ref no 8.

This brake band fits inside the 915 manual gearbox, within the synchroniser assembly for 3rd, 4th, and 5th gear. It is an internal transmission component and is accessed during gearbox disassembly or synchroniser service.

The synchro brake band works as part of the gearbox synchroniser system. During gear changes, it helps control and equalise the speed of the gear and synchroniser hub before engagement. This allows the gear to engage more smoothly and helps reduce grinding, baulking, or difficult shifting.

Functions
• Supports smooth gear engagement in the 915 gearbox
• Helps synchronise gear speed during shifting
• Reduces gear clash, grinding, and shift resistance
• Works with the synchro ring, anchor block, energiser block, and operating sleeve
• Helps restore correct shift quality in worn gearbox assemblies
• Provides an OE Match replacement for the original brake band
• Suitable for gearbox rebuilds and synchroniser repairs

Why Replace This Part?
The synchro brake band is subject to wear every time the gearbox is shifted. Over time, it can become worn, distorted, cracked, or weakened, which may lead to poor synchroniser performance. A worn brake band can contribute to grinding gears, difficult engagement, or a notchy shift feel, especially in higher gears. Replacing it during gearbox service helps restore smoother gear changes and supports long-term transmission reliability.

When to Replace:
• The gearbox is grinding when selecting 3rd, 4th, or 5th gear
• Gear changes feel notchy, stiff, or difficult
• The transmission baulks or resists engagement
• The 915 gearbox is being rebuilt or inspected
• The synchroniser ring or operating sleeve is being replaced
• The brake band is worn, cracked, bent, or damaged
• There is excessive wear in the synchroniser assembly
• As preventative replacement during a full gearbox overhaul

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91130231608

The product you are viewing cross references to these numbers

Synchro Brake Band 2nd Gear.
The OE Match 2nd Gear Synchro Brake Band is a high-quality replacement transmission component designed to ensure smooth and precise engagement of second gear in Porsche manual gearboxes. Manufactured to OE specifications for fit, accuracy and durability, this brake band forms an integral part of the synchroniser assembly, helping to equalise gear speeds before engagement occurs.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 39

Working alongside the synchroniser ring, dog teeth, synchroniser hub and selector sleeve, the synchro brake band creates the friction required to slow or accelerate rotating gearbox components, allowing second gear to engage smoothly and efficiently. Precision engineering ensures reliable gear synchronisation, improved shift quality and reduced wear on internal transmission components.  

What This Product Does:

• Assists in synchronising gear speeds before second gear engagement.
• Works as part of the transmission synchroniser assembly.
• Helps provide smooth and accurate gear changes.
• Reduces gear clash and grinding during shifting.
• Supports proper operation of the synchroniser ring and hub.
• Minimises wear on transmission engagement components.
• Contributes to reliable manual gearbox performance.

Symptoms Of Wear Or Failure:

• Difficulty engaging second gear.
• Gear grinding or crunching when shifting into second.
• Increased resistance during gear changes.
• Notchy or inconsistent shift quality.
• Requirement to shift slowly to avoid gear clash.
• Excessive gearbox noise during gear engagement.
• Poor synchronisation between gear and shaft speeds.
• Accelerated wear of synchro rings, dog teeth and selector sleeves.

Why Replacement Matters:

• The synchro brake band is subjected to constant friction and wear every time second gear is selected. Over time, the friction surfaces can wear down, reducing the component's ability to equalise rotational speeds before gear engagement. This can result in difficult shifting, gear clash and increased stress on other synchroniser components.
• A worn brake band can compromise synchroniser performance and accelerate wear throughout the gearbox. If left unresolved, continued operation may lead to damage of synchro rings, dog teeth and selector sleeves, potentially resulting in more extensive and costly transmission repairs.
• Replacing a worn synchro brake band restores proper synchronisation, improves shift quality and helps protect the gearbox from premature internal wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring smooth and dependable transmission operation for your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92830231801

The product you are viewing cross references to these numbers

Synchro Brake Band 1st Gear.
Manual transmission Synchro / Brake Band (Synchroniser band) engineered to match Porsche’s original specifications. Provides friction control during gear synchronisation, allowing smooth and quiet gear changes.

Fits:
Porsche 911 1974 - 1986 (915 Gearbox)

Diagram ref no 37

The synchro / brake band is part of the gearbox synchroniser system, helping to slow or control rotation of a gear or hub during shift transitions, promoting smooth engagement and preventing clash. It works in concert with the synchroniser rings, hubs, sleeves, and gearsets to align speeds of rotating parts before lock-in. Proper material, friction surface, and design are critical — the band must provide the correct friction characteristics without binding or excessive wear.

•  Installation: Direct OE replacement — recommended during gearbox overhaul
•  Position / Location:  This part is located inside the manual transmission, within the synchroniser assembly — the mechanism that equalizes gear and shaft speeds for smooth engagement. It wraps around the synchroniser hub and works with the synchro ring and dog teeth gear to provide friction and control during shifting.
•  Benefits: Restores synchroniser performance, eliminates grinding, reduces wear on gears and rings

Why replacement matters:
•  With use, the original band’s friction surfaces can glaze, wear, or lose consistency, impairing its ability to slow or stabilise gear/hub motion during shifting.
•  A worn or ineffective brake / synchro band can result in grinding gears, missed shifts, or gear clash, especially under load or during aggressive shifting.
•  Installing a high-quality replacement restores proper friction behaviour, enabling smooth engagement, reducing wear on adjacent synchroniser elements, and extending transmission life.
•  Because the transmission internals are sensitive to mismatches or degraded components, having a reliable replacement band ensures system integrity and maintains the “feel” of the gearbox.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92830231908

The product you are viewing cross references to these numbers

Synchro Ring 3rd / 4th / 5th Gear. (3 Per Gearbox)
The OE Match Synchro Ring is a high-quality replacement transmission component designed for use in 3rd, 4th and 5th gear positions within Porsche manual gearboxes. Manufactured to OE specifications for fit, precision and durability, this synchroniser ring plays a critical role in ensuring smooth and accurate gear changes by matching gear and shaft speeds before engagement.  

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 914 (1970-1976)  

Diagram Ref No 10

Working in conjunction with the synchroniser hub, selector sleeve and dog teeth, the synchro ring uses friction to equalise rotational speeds between transmission components, allowing gears to engage smoothly and reducing wear on the gearbox. Three synchro rings are typically required per gearbox, one for each applicable gear position.  

What This Product Does:

• Synchronises gear and shaft speeds before engagement.
• Enables smooth selection of 3rd, 4th and 5th gears.
• Reduces gear clash and grinding during shifting.
• Works with the synchroniser assembly and dog teeth.
• Improves gearbox shift quality and drivability.
• Minimises wear on transmission engagement components.
• Supports reliable and efficient manual gearbox operation.

Symptoms Of Wear Or Failure:

• Difficulty engaging 3rd, 4th or 5th gear.
• Gear grinding or crunching during gear changes.
• Increased resistance when shifting.
• Notchy, inconsistent or rough gear engagement.
• Requirement to force the gear lever into gear.
• Excessive transmission noise during shifting.
• Poor shift quality, especially at higher engine speeds.
• Accelerated wear of dog teeth, selector sleeves and related components.

Why Replacement Matters:

• Synchroniser rings are wear items that experience friction every time a gear is selected. Over time, the friction surfaces wear down, reducing their ability to equalise gear speeds before engagement. This can result in difficult gear selection, noisy shifts and increased wear throughout the transmission.
• A worn synchro ring places additional stress on dog teeth, selector sleeves and synchroniser hubs, potentially leading to more extensive gearbox damage and expensive repairs if left unattended. Reduced synchronisation can also detract from driving enjoyment and compromise the smooth operation expected from a Porsche manual transmission.
• Replacing worn synchro rings restores proper synchronisation, improves gear change quality and helps protect other internal gearbox components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring dependable transmission performance and smooth gear engagement.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91130230113

The product you are viewing cross references to these numbers

Synchro ring 2nd gear, for 915 Gearbox.
This synchroniser ring that fits into the 915 gearbox of a Porsche 911. Its role is to match the rotational speed of a gear to the shaft before the dog teeth engage, enabling grind-free shifting, especially into 2nd gear.

Fits:
Porsche 911 2nd Gear Only 1974 -  1986 (915 Trans.)
Porsche 912E 1st-2nd Gears 1972 - 1976

Diagram Ref no 39.

•  Function: The synchroniser ring helps match the speed of the transmission shaft and gear before engagement, enabling smooth shifting without gear clash. 

•  Position: Located inside the 915 manual gearbox, specifically associated with 1st/2nd gear synchronising assembly (diagram ref no 39)

•  Benefit: Restores precise gear changes, reduces shifting effort, prevents gearbox noise or damage

Over time, the synchroniser ring’s friction surfaces wear, reducing its ability to align gear speeds. This can lead to gear grinding, difficulty selecting 2nd gear, or “pop-out” under load.

When to replaces:
• During a gearbox overhaul or rebuild of a 915 transmission.
• If you experience gear grinding, hard 2nd gear shifts, or gear pop-out.
• When you’re replacing other major gearbox components - installing a new synchro ring ensures correct engagement and long transmission life.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91530230114

The product you are viewing cross references to these numbers

Synchro Ring 1st Gear.
The OE Match 1st Gear Synchro Ring is a high-quality replacement transmission component designed to facilitate smooth and precise engagement of first gear in Porsche manual gearboxes. Manufactured to OE specifications for fit, accuracy and durability, this synchroniser ring forms a critical part of the gearbox synchronisation system, helping to match gear and shaft speeds before engagement occurs.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 39

Working alongside the synchroniser hub, dog teeth and selector sleeve, the synchro ring reduces speed differences between rotating gearbox components, allowing gears to engage smoothly without excessive noise, grinding or wear. Precision engineering ensures reliable operation and helps maintain the shift quality expected from a Porsche transmission.  

What This Product Does:

• Synchronises rotational speeds before first gear engagement.
• Helps ensure smooth and precise gear changes.
• Reduces gear clash and grinding during shifting.
• Works with the synchroniser assembly and dog teeth.
• Improves transmission shift quality and drivability.
• Minimises wear on gearbox engagement components.
• Supports reliable operation of the manual transmission.

Symptoms Of Wear Or Failure:

• Difficulty selecting first gear.
• Gear grinding or crunching during engagement.
• Increased resistance when shifting into first gear.
• Notchy or inconsistent gear changes.
• Requirement to force the gear lever into position.
• Excessive gearbox noise during shifting.
• Premature wear of dog teeth and related synchroniser components.
• Poor shift quality, particularly when the gearbox is cold.

Why Replacement Matters:

• Synchroniser rings are subjected to constant friction and wear every time a gear is selected. Over time, the friction surfaces can wear down, reducing their ability to equalise rotational speeds effectively before gear engagement. This can lead to difficult gear selection, increased transmission noise and accelerated wear of surrounding gearbox components.
• A worn synchro ring can place additional strain on dog teeth, selector sleeves and synchroniser hubs, potentially leading to more extensive and expensive gearbox repairs if left unresolved. Poor synchronisation can also diminish driving enjoyment and compromise the smooth operation of the transmission.
• Replacing a worn first gear synchro ring restores proper synchronisation, improves shift quality and helps protect the transmission from further internal wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring smooth and reliable gearbox performance for your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91530230113

The product you are viewing cross references to these numbers

Dog Teeth 3rd/4th/5th Gear. (3 per gearbox)
G901 2rd to 5th Gear,
G915 3rd to 5th Gear

Manual transmission gear teeth are precision-engineered ridges on the gears inside a manual gearbox. These teeth interlock to transfer power from the engine to the driveshaft. Their exact shape and alignment ensure smooth gear engagement, efficient torque delivery, and dependable performance across all gear ratios. Keeping the gear teeth strong and undamaged is crucial for preventing slippage, maintaining power, and extending the overall life of the transmission.

Fits:
Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera (915 Gearbox)
Porsche 911 1978-1983 3.0L / SC (915 Gearbox)
Porsche 911 1984-1986 3.2L (915 Gearbox)

Signs of Manual Transmission Gear Teeth Failure

• Grinding or whining noises during shifting, often caused by worn or damaged teeth.
• Difficulty engaging gears due to misaligned or broken gear teeth.
• Loss of power or gear slippage when the teeth can no longer mesh correctly.

Diagram Ref no 6, 15, 23.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90130224203

The product you are viewing cross references to these numbers

Transmission gearbox teeth. Dog teeth 2nd gear. 
G915 up to 1975 1st gear  /  G915 1976>> 2nd. gear

Fits:
Porsche 911 1974-86 (915 Gearbox)

Dog Teeth 2nd Gear 911 1972-86 Symmetrical Tooth Point, 1 slot in hub (915 Trans. 1972-86)

Diagram Ref no 35.

A dog-teeth gear (or synchronizer-gear hub / 1st-2nd gear dog gear) used inside the 915 gearbox. This gear section engages with corresponding hub or clutch-dog components to allow shifting between gears - in particular 1st and/or 2nd gear depending on the configuration.

Gears inside classic 915 transmissions - especially dog / synchronizer-gears - are subject to wear over time: tooth heads can round off, suffer chip-out, or distort under load; synchronizer engagement surfaces may wear and lose precision. This can cause:
• Gear-slip or missed shifts
• Grinding or clash during shifting
• Torque transmission loss or vibration under load
• Accelerated wear of other transmission internals.
Replacing worn gears with a precisely machined, correctly hardened OE-match replacement restores gear-mesh integrity, retains gearbox performance, and helps avoid costly gearbox failure.

When to Replace.
Consider fitting this gear if:
• You hear grinding, clash, or crunching during shifting - especially into 1st or 2nd gear
• Gearbox inspection reveals worn, rounded, chipped, or damaged dog-teeth or synchronizer surfaces
• You are performing a full gearbox rebuild or overhaul
• The gearbox has high mileage or signs of internal wear
•  You want to restore factory-spec shifting performance and reliability

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91530224200

The product you are viewing cross references to these numbers

Dog Teeth 1st Gear.
The OE Match 1st Gear Dog Teeth is a high-quality replacement gearbox component designed for Porsche manual transmissions. Manufactured to OE specifications for fit, precision and durability, this component forms a critical part of the gear engagement mechanism, allowing smooth and secure engagement of first gear during operation.  

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 43

The dog teeth ring is fitted to the gear assembly and works in conjunction with the synchroniser hub, synchroniser ring and selector sleeve. It provides the engagement points that lock the selected gear to the transmission shaft, ensuring efficient transfer of engine power through the gearbox. Precision machining is essential for smooth shifting performance and long transmission service life.  

What This Product Does:

• Provides the engagement surface for first gear selection.
• Works with the synchroniser assembly to enable smooth gear changes.
• Locks first gear to the transmission shaft when selected.
• Ensures efficient transfer of engine power through the gearbox.
• Supports accurate and reliable gear engagement.
• Helps minimise transmission wear during shifting.
• Contributes to smooth manual gearbox operation.

Symptoms Of Wear Or Failure:

• Difficulty engaging first gear.
• Gear crunching or grinding during gear selection.
• First gear jumping out of engagement under load.
• Increased resistance when shifting into first gear.
• Poor shift quality or inconsistent engagement.
• Excessive transmission noise during gear changes.
• Visible wear, rounding or chipping of the dog teeth during inspection.
• Premature wear of related synchroniser components.

Why Replacement Matters:

• Dog teeth are subjected to repeated engagement loads every time a gear is selected. Over time, the engagement surfaces can become worn, rounded or damaged, particularly in high-mileage transmissions or vehicles subjected to aggressive shifting. As wear progresses, gear engagement becomes increasingly difficult and less precise.
• A worn dog teeth ring can compromise synchroniser performance and may eventually prevent proper engagement of first gear. Continued operation with worn components can accelerate wear of synchroniser hubs, selector sleeves and other transmission parts, leading to more extensive and costly gearbox repairs.
• Replacing worn first gear dog teeth restores precise gear engagement, improves shift quality and helps protect the transmission from further internal wear. An OE Match replacement provides factory-style fitment, accurate machining and long-term durability, ensuring reliable gearbox operation and preserving the driving experience expected from your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91530224114

The product you are viewing cross references to these numbers