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Porsche // 964 (911) (1989-1994) // 964 (911) TURBO 3.3L 1991-93
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Gearbox Syncro Ring / Brake Band / Dog Teeth
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
G50 Transmission synchroniser ring for 1st – 2nd gear.
This OE Match synchroniser ring is a direct-fit replacement for the 1st/2nd gear synchro teeth in Porsche G50 (or G-series) manual transmissions. It is built to the correct dimensions, materials, and tolerances for reliable gear engagement and longevity.
Fits
Porsche 911 / 964 / 965 (1987 - 1994) - G50 - 1st - 2nd Gear
Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the gearbox identification as well as the vehicle details; the model listing alone does not identify every transmission version.
What This Product Does
The engagement teeth form part of the manual gearbox synchroniser assembly. They work with the associated selection components to engage the chosen gear. This component should not be confused with a complete synchroniser assembly or a friction ring alone.
Functions
- Provides engagement teeth for first and second gear selection.
- Works alongside the gearbox synchroniser and selector components.
- Replaces worn teeth during an internal transmission repair.
Technical Details
- Supplied reference: 92830421010.
- Brand: OE Match.
- Application: first and second gear, manual transmission.
- Supplied transmission identification: G50
Symptoms of Fault
- Crunching or grinding as the affected gear is selected.
- Resistance or hesitation before engagement.
- Gear clash during downshifts.
- Visible wear or damage found during gearbox dismantling.
These symptoms are not conclusive evidence of damaged teeth. Clutch operation, linkage condition, lubricant and other internal components can produce similar complaints.
Why Replacement Matters
Replacing damaged engagement teeth addresses an identified source of selection trouble during a gearbox rebuild. Inspect the mating components at the same time, rather than assuming that replacing one item will resolve every shifting fault. OE Match focuses on Porsche replacement applications, with specification reviews and sample assessment forming part of its development process.
FAQs
Can fresh gearbox oil repair worn teeth?
No. Correct lubricant may affect shift feel, but it cannot restore damaged engagement surfaces.
Does difficult selection always mean internal gearbox wear?
No. Check clutch release, linkage adjustment and mounts before deciding which internal parts need attention.
What else should be inspected during repair?
Assess the related synchroniser components, selectors, bearings and seals, replacing other items according to their condition and the gearbox repair procedure.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421010
The product you are viewing cross references to these numbers
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
OE Match synchroniser gear teeth for 3rd–5th gear applications in Porsche 911, 964 and 965 G50 manual gearboxes. Intended for repairs involving worn synchroniser components.
Fits
- Porsche 911 / 964 / 965 (87-94) - G50 - 3rd - 5th Gear
- Synchro Gear Teeth 911 1987-94 3rd-5th Gears
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 911 1987-1989 3.2L G50
What This Product Does
This component forms part of the gearbox synchroniser assembly used during selection of third, fourth and fifth gears. Synchroniser components work together to bring rotational speeds into alignment before the selected gear engages.
Functions
- Supports synchroniser operation during gear selection.
- Works with adjoining components to manage engagement of the selected gear.
- Provides a replacement component for a manual gearbox repair or rebuild.
Technical Details
- Supplied reference: 92830420910.
- Brand: OE Match.
- Transmission application: G50 manual.
- Gear positions: third, fourth and fifth.
- Component identification: synchroniser ring / synchro gear teeth.
Symptoms of Fault
- Crunching or grinding while selecting an affected gear.
- Resistance or a noticeable pause before engagement.
- Gear clash during downchanges.
- Notchy selection that requires further diagnosis.
Why Replacement Matters
Renewal is appropriate when inspection confirms synchroniser wear or damage. Worn adjoining parts should also be assessed during dismantling rather than assuming that one replacement will resolve every shifting fault. OE Match focuses on Porsche replacement applications, with specification and fitment checks forming part of its component selection process.
FAQs
Does difficult selection always indicate synchroniser wear?
No. Clutch operation, selector linkage, mounts and lubricant condition can produce similar symptoms, so diagnosis should precede dismantling.
Can fresh gearbox oil repair worn teeth?
A suitable lubricant may influence shift feel, but it cannot reverse mechanical wear or repair damaged teeth. Use the specification required for the gearbox.
What should be checked during the repair?
Inspect the associated synchroniser parts, engagement components and selector mechanism, together with seals and other accessible wear items.
Is double-declutching a repair?
It may reduce symptoms in some circumstances, but it does not correct worn internal components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830420910
The product you are viewing cross references to these numbers
- 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) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
1st & 2nd Gear Synchro Ring
Sold each - 2 required per car
Restore precise gear selection and smooth shifting with this
OE Match 1st & 2nd Gear Synchro Ring. Manufactured to replicate the original factory
specification, this direct replacement on G50 manual transmissions, helping to restore crisp gear
engagement and prolong gearbox life.
Fits:
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1 1989 3.3L Turbo (930) G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Diagram Ref no 32
Whether you're carrying out a complete transmission rebuild or replacing worn synchroniser components, this OE Match synchro ring delivers the fit, function and reliability expected from an original-style replacement.
What Does the Synchro Ring Do?
The synchro ring is one of the most important wear components inside the manual gearbox.
Its primary functions include:
- Matching the rotational speed of the selected gear and the gearbox shaft before engagement.
- Allowing smooth gear changes without gear clash.
- Reducing wear on gear teeth and engagement hubs.
- Improving shift quality and driver confidence.
- Helping protect internal gearbox components from excessive wear.
A correctly functioning synchro ring is essential for the smooth, precise shift quality that Porsche G50 gearboxes are known for.
Why Do Synchro Rings Fail?
Synchroniser rings are designed as wear components and gradually lose effectiveness through normal operation.
Common causes of failure include:
- Normal wear from repeated gear changes.
- Aggressive or high-performance driving.
- High mileage. Poor lubrication or degraded gearbox oil.
- Excessive heat generated within the transmission.
- Incorrect shifting techniques causing premature wear.
As the friction surface wears, the synchroniser can no longer effectively match gear speeds, resulting in increasingly difficult gear engagement.
When Should They Be Replaced?
Replacement is recommended when:
- First or second gear becomes difficult to engage.
- Gear changes produce grinding or crunching noises.
- The gearbox jumps out of gear under load.
- Shift quality deteriorates, particularly when cold.
- Carrying out a complete gearbox overhaul.
- Replacing worn synchroniser hubs, sleeves or bearings.
- Rebuilding a high-mileage or performance transmission.
As gearbox disassembly is required, replacing synchro rings alongside other wear components is considered best practice during a transmission rebuild.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030431102
The product you are viewing cross references to these numbers
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Synchro Ring – 3rd / 4th /
5th & Reverse Gear
Sold each - 4 required per car
Restore the smooth, precise gear changes your Porsche was
designed to deliver with this OE Match Synchro Ring for the Porsche 964 manual
gearbox. Manufactured to the original factory specification,
this helps provide accurate synchronisation
and helping restore crisp, positive gear engagement.
Fits:
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Diagram Ref no 7
Each Porsche 964 manual gearbox uses four of these synchroniser rings, one for 3rd gear, 4th gear, 5th gear and reverse gear. Whether you're carrying out a complete transmission overhaul or replacing worn synchroniser components, this OE Match synchro ring offers factory-style fit, performance and durability.
What Does the Synchro Ring Do?
The synchro ring is a critical wear component within the manual transmission synchroniser assembly.
Its primary functions include:
- Synchronising the rotational speed of the selected gear and gearbox shaft before engagement.
- Allowing smooth, quiet gear changes without gear clash.
- Reducing wear on gear teeth, selector sleeves and synchroniser hubs.
- Improving shift quality and gear engagement.
- Protecting expensive internal gearbox components from premature wear.
- Maintaining the refined shifting performance expected from the Porsche 964 manual transmission.
A correctly functioning synchroniser ring is essential for smooth, accurate and reliable gear changes.
Why Do Synchro Rings Wear Out?
Synchroniser rings are designed to wear gradually during normal operation.
Common causes of wear include:
- High mileage.
- Frequent gear changes.
- Aggressive driving or rapid shifting.
- Worn or contaminated gearbox oil.
- Excessive gearbox temperatures.
- Wear to associated synchroniser hubs and selector sleeves.
- General fatigue of the friction surface over time.
As the friction material wears, the synchroniser becomes less effective at matching gear speeds, leading to more difficult gear selection and increased gearbox wear.
When Should the Synchro Ring Be Replaced?
Replacement is recommended when:
- Gear changes become stiff or notchy.
- Grinding or crunching occurs when selecting gears.
- The gearbox is stripped for overhaul.
- The synchroniser ring shows visible wear or damage.
- Replacing synchroniser hubs, selector sleeves or bearings.
- Rebuilding a high-mileage transmission.
- Preparing a gearbox for fast road or performance use.
Because gearbox disassembly is required, replacing all worn synchroniser rings during a rebuild is considered best practice.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421105
The product you are viewing cross references to these numbers
Porsche Gearbox Synchro Rings, Brake Bands & Dog Teeth | Precision Shifting Components for Smooth Gear Engagement
Synchro rings, brake bands, and dog teeth are essential components in your Porsche’s gearbox, designed to ensure smooth, precise, and quick gear changes. These parts allow gears to match speed before engagement, preventing grinding, wear, and missed shifts — maintaining the refined driving feel expected from every Porsche.
At Design911, we supply high-quality synchro rings, brake bands, and dog teeth engineered to meet or exceed original performance specifications. Manufactured from precision-cut steel alloys and hardened friction materials, these components are built for strength, durability, and seamless operation under both road and performance driving conditions.
Whether you’re rebuilding a classic Porsche transmission, maintaining a daily driver, or preparing a track-ready gearbox, our synchro and engagement components restore smooth shifting and reliability.
What Do Synchro Rings, Brake Bands & Dog Teeth Do?
These precision-engineered parts are responsible for synchronising gear speeds and ensuring positive engagement during shifting.
Core Functions:
- Synchro
Rings: Match rotational speeds between gears before engagement.
- Brake
Bands: Control the friction needed to synchronise gears efficiently.
- Dog Teeth: Engage the synchro hub with the selected gear to complete the shift.
Together, they allow seamless transitions between gears, reducing shock loads on the gearbox and ensuring crisp, responsive shifting across all driving conditions.
Why Do Synchro Rings, Brake Bands & Dog Teeth Fail or Wear Out?
These components are subject to extreme friction, pressure, and heat with every gear change. Over time, constant use and lubrication breakdown cause material fatigue and reduced performance.
Common Causes of Failure Include:
- Friction surface wear on synchro rings due to age or low-quality lubricant.
- Deformation or breakage of dog teeth from aggressive shifting.
- Worn brake bands leading to poor gear synchronisation.
- Contaminated gearbox oil reducing friction control.
- Heat stress from performance driving or clutch drag.
When these parts wear out, symptoms include gear crunching, resistance when shifting, missed gears, or grinding noises — clear signs it’s time for replacement.
Why Replace Your Porsche Gearbox Synchro Rings, Brake Bands & Dog Teeth?
Replacing worn synchroniser components restores precise gear changes, prevents gearbox damage, and extends transmission lifespan. Upgrading to performance or reinforced designs enhances engagement speed and consistency — ideal for high-performance or track-driven Porsches.
Key Benefits:
- Restores smooth, accurate gear changes.
- Eliminates gear crunching, grinding, and engagement delay.
- Prevents gearbox wear and protects internal components.
- Ensures reliable shifting under load or high-speed driving.
- Available for Porsche 911, Cayman, Boxster, and classic models.
- Suitable for gearbox rebuilds, restorations, or performance upgrades.
During gearbox servicing, it’s highly recommended to replace synchro rings, brake bands, and dog teeth as a complete set to ensure balanced wear and consistent operation.
Highlights
- Premium Porsche synchro rings, brake bands, and dog teeth.
- Designed for smooth, precise, and durable gear engagement.
- Heat-treated and precision-machined for longevity.
- Direct-fit replacements for all Porsche gearbox types.
- Ideal for manual transmission rebuilds and performance upgrades.
- Restores shifting quality and transmission reliability.
