do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Synchro Ring – G50 5-Speed Gearbox
Restore the precise gear changes your Porsche was engineered
to deliver with this OE Match Synchro Ring for the Porsche 911 G50 5-speed
manual gearbox (1987-1989). Manufactured to replicate the original
factory specification, this is precision engineered to provide smooth, accurate
synchronisation between gears, helping eliminate gear clash and restore crisp
shifting performance.
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1989 3.3L Turbo G50
Diagram Ref no 7
Designed for use during gearbox rebuilds or transmission
repairs, this OE Match synchroniser ring is manufactured from high-quality
materials to ensure consistent friction characteristics, long service life and
reliable operation. Whether you're restoring a road car or rebuilding a
performance transmission, this component helps return your G50 gearbox to
factory-level performance.
What Does a Synchro Ring Do?
The synchro ring (synchroniser ring) is one of the most important wear components inside a manual gearbox.
Its primary functions include:
Synchronising
the rotational speed of the selected gear and gearbox shaft before
engagement.
- Allowing smooth gear changes without grinding.
- Reducing wear on the gear teeth, hubs and selector sleeves.
- Improving shift quality and driver confidence.
- Helping protect expensive gearbox components from premature wear.
- Delivering the precise gear engagement expected from the Porsche G50 transmission.
Without a correctly functioning synchro ring, gears cannot engage smoothly, resulting in poor shift quality and increased gearbox wear.
Why Do Synchro Rings Wear Out?
Synchroniser rings are designed as sacrificial wear components and naturally deteriorate over time.
Common causes of wear include:
- High mileage.
- Frequent gear changes during normal driving.
- Aggressive or high-performance driving.
- Poor shifting technique.
- Contaminated or degraded gearbox oil.
- Excessive transmission temperatures.
- Wear to associated synchroniser hubs and selector sleeves.
As the friction material wears, the synchroniser becomes less effective at matching gear speeds, making gear engagement progressively more difficult.
When Should the Synchro Ring Be Replaced?
Replacement is recommended when:
- Gear changes become difficult or notchy.
- Gears grind or crunch during selection.
- The gearbox is stripped for overhaul.
- The synchroniser ring shows visible wear or damage.
- Replacing selector hubs, sleeves or bearings.
- Restoring a high-mileage G50 gearbox.
- Building a performance or competition transmission.
As gearbox disassembly is required, it is considered best practice to replace all worn synchroniser components during a rebuild.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421105
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
2nd Gear Dog Teeth
Restore precise gear engagement and transmission performance
with this OE Match 2nd Gear Dog Teeth Ring designed for Porsche 911 turbo (930) models produced between 1977
and 1988. As a critical component of the synchroniser assembly, the dog teeth
ring allows smooth and reliable engagement of 2nd gear, helping maintain the
shifting quality and driving characteristics expected from the legendary
Porsche Turbo drivetrain.
Fits:
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1988 3.3L Turbo (930)
Diagram Ref no 35
Manufactured to OE specifications, this replacement dog teeth ring delivers precise machining, excellent durability and factory-correct fitment. Whether you're rebuilding a Porsche 930 gearbox, addressing synchroniser wear or carrying out a full transmission restoration, replacing worn dog teeth is essential for achieving smooth gear changes and long-term gearbox reliability.
What Do 2nd Gear Dog Teeth Do?
The dog teeth ring is mounted directly to the gear and forms an essential part of the Porsche 930 synchroniser system. During a gear change, the synchroniser assembly matches the rotational speed of the selected gear before the operating sleeve engages the dog teeth to lock the gear to the shaft.
The dog teeth perform several vital functions:
- Enable smooth engagement of 2nd gear.
- Provide the engagement surface for the operating sleeve.
- Help synchronise gear speeds during shifting.
- Reduce gear clash and transmission wear.
- Maintain precise gear selection.
- Support reliable gearbox operation under load.
In the high-torque Porsche 930 transmission, properly functioning dog teeth are critical for maintaining shift quality and preventing excessive wear to other synchroniser components.
Why Do 2nd Gear Dog Teeth Fail?
Dog teeth are subjected to repeated impact loads during every gear change. Over time, wear gradually alters the shape of the engagement teeth, reducing their effectiveness and causing shifting issues.
Common causes of failure include:
- High mileage transmission wear.
- Aggressive shifting and rapid gear changes.
- Worn synchroniser rings.
- Poor gearbox lubrication.
- Contaminated transmission oil.
- Excessive drivetrain loading.
- Gear grinding during engagement.
- Age-related wear and fatigue.
Second gear is one of the most frequently used gears during normal driving, making its synchroniser and dog teeth assembly particularly vulnerable to long-term wear.
When Should 2nd Gear Dog Teeth Be Replaced?
The dog teeth ring should always be inspected whenever the
gearbox is dismantled. Replacement is recommended if you notice:
- Difficulty engaging 2nd gear.
- Crunching or grinding during shifts.
- Rounded or hooked engagement teeth.
- Gear engagement becoming increasingly notchy.
- Visible wear, chipping or damage.
- Excessive synchroniser wear.
- Transmission rebuild requirements.
Most Porsche gearbox specialists recommend replacing worn dog teeth during transmission overhauls to restore smooth shifting and protect other synchroniser components from premature wear.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030224200
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
3rd / 4th Gear Dog Teeth
Restore precise shifting performance and gearbox reliability
with this OE Match 3rd / 4th Gear Dog Teeth Ring designed for Porsche 911 Turbo (930) models produced
between 1975 and 1988. As a vital component within the synchroniser assembly,
the dog teeth ring allows smooth engagement of 3rd and 4th gears, helping
maintain the crisp shifting characteristics expected from the legendary Porsche
Turbo transmission.
Fits:
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1988 3.3L Turbo (930)
Diagram Ref no 32 & 34
Manufactured to OE specifications, this replacement dog teeth ring provides accurate machining, correct tooth geometry and exceptional durability for transmission rebuilds, restorations and performance maintenance. Whether you're rebuilding a worn gearbox or restoring a classic Porsche 930 to factory standards, replacing worn dog teeth is essential for preserving smooth gear selection and transmission longevity.
What Do 3rd / 4th Gear Dog Teeth Do?
The dog teeth ring forms an integral part of the Porsche 930 synchroniser assembly. Mounted to the gear, it provides the engagement interface between the gear and the synchroniser operating sleeve.
During a gear change, the synchroniser system matches rotational speeds between components before the operating sleeve engages the dog teeth, locking the selected gear to the shaft and transmitting engine power through the transmission.
The dog teeth help:
- Enable smooth engagement of 3rd and 4th gears.
- Provide positive gear locking during operation.
- Reduce gear clash during shifting.
- Improve gear change precision.
- Support synchroniser operation.
- Maintain reliable gearbox performance under load.
Properly functioning dog teeth are essential for preserving the smooth shift quality and driving enjoyment of the Porsche 930 transmission.
Why Do 3rd / 4th Gear Dog Teeth Fail?
Over time, repeated gear changes gradually wear the engagement surfaces of the dog teeth. As wear increases, gear engagement quality deteriorates and additional stress is placed on the synchroniser assembly.
Common causes of failure include:
- High mileage wear.
- Aggressive driving and fast shifting.
- Worn synchroniser rings.
- Gear grinding during engagement.
- Contaminated gearbox oil.
- Inadequate transmission maintenance.
- Excessive drivetrain loads from turbocharged performance.
- Age-related metal fatigue.
Third and fourth gears often see frequent use during normal road driving and higher-speed operation, making their synchroniser components susceptible to long-term wear.
When Should 3rd / 4th Gear Dog Teeth Be Replaced?
Dog teeth should be inspected whenever the gearbox is
dismantled or rebuilt. Replacement is recommended if you experience:
- Difficulty engaging 3rd or 4th gear.
- Gear crunching or grinding during shifts.
- Rounded, hooked or worn engagement teeth.
- Excessive synchroniser wear.
- Poor shift quality.
- Visible damage or chipping.
- Transmission rebuild requirements.
Most Porsche transmission specialists replace worn dog teeth alongside synchroniser rings, guide hubs and operating sleeves during gearbox overhauls to ensure optimal shifting performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030224300
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 Turbo 1975-88 4 speed
Click 'Zoom in' to see the diagram.
Diagram Ref no 41.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030230100
The product you are viewing cross references to these numbers