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Gearbox Syncro Ring / Brake Band / Dog Teeth
Fits: Porsche 928
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830224200
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
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12 Month Warranty
Worldwide Delivery
Fits: Porsche 928
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830224300
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 928 1978-86
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830230131
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold each.
Fits:
Porsche 928 1978-86
Click 'Zoom in' for large parts diagram.
Diagram ref no 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830230231
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
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12 Month Warranty
Worldwide Delivery
Synchro Ring – 3rd / 4th / 5th & Reverse Gear
Restore the smooth, precise gear changes your Porsche was
engineered to deliver with this OE Match Synchro Ring for the Porsche 928
5-speed manual gearbox. Manufactured to the original factory
specification, this helps to restore
crisp gear engagement while reducing wear on the transmission's synchronising
components.
Fits:
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram Ref no 7
Precision manufactured from high-quality materials, this synchroniser ring delivers consistent friction characteristics for reliable synchronisation between the selected gear and gearbox shaft. Whether you're carrying out a complete gearbox rebuild or replacing worn synchroniser components, this OE Match synchro ring provides factory-style fit, performance and durability.
What Does the Synchro Ring Do?
The synchro ring is a vital component within the manual gearbox synchroniser assembly.
Its primary functions include:
- Synchronising the speed of the selected gear and gearbox shaft before engagement.
- Allowing smooth gear changes without grinding or gear clash.
- Reducing wear on gears, selector sleeves and synchroniser hubs.
- Providing smooth, positive gear engagement.
- Protecting expensive internal gearbox components.
- Maintaining the refined shifting characteristics of the Porsche 928 transmission.
A correctly functioning synchro ring ensures each gear engages smoothly with minimal effort.
Why Do Synchro Rings Wear Out?
Synchroniser rings are designed as service wear components and naturally deteriorate through use.
Common causes of wear include:
- High mileage.
- Repeated gear changes during everyday driving.
- Aggressive shifting or performance driving.
- Worn or contaminated gearbox oil.
- Excessive gearbox temperatures.
- General fatigue of the synchroniser friction surfaces.
- Wear to associated hubs and selector sleeves.
As the friction surface wears, the synchroniser becomes less effective at matching gear speeds, resulting in increasingly difficult or noisy gear changes.
When Should the Synchro Ring Be Replaced?
Replacement is recommended when:
- Gear selection becomes difficult.
- Grinding or crunching occurs during gear changes.
- The gearbox is being rebuilt.
- Inspection reveals worn or damaged synchroniser rings.
- Replacing synchroniser hubs, selector sleeves or bearings.
- Restoring a high-mileage transmission.
- Building a performance or competition gearbox.
Because gearbox disassembly is required, replacing all worn synchroniser components 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 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 928 S4 / GT 1987-91 with Gearbox: G2812, G2813, G2855
Porsche 928 GTS 1991-95 with Gearbox: G2857
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421134
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold each.
Fits:
Porsche 928 1987-95 (G28.12, G28.13, G28.55, G28.57)
Click 'Zoom in' for large parts diagram.
Diagram ref no 7A
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421112
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold each.
Fits:
Porsche 928 1987-95 (G28.12, G28.13, G28.55, G28.57)
Click 'Zoom in' for large parts diagram.
Diagram ref no 7A
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421112
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Shop Securely
12 Month Warranty
Worldwide Delivery
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.
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed