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Gearbox Syncro Ring / Brake Band / Dog Teeth
By OE Match
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MKII GT3 / GT3 RS 2010-11
Synchroniser ring is a replacement designed for Porsche manual gearbox applications, ensuring smooth and reliable gear changes. Installed within the transmission’s synchromesh hub assembly, this ring facilitates the engagement of gears by matching rotational speeds before meshing, thereby eliminating grinding and excessive wear. Built to match Porsche’s original specification.
Sold each
Fits:
Porsche 911 (993) (1995-1998) (3rd-6th gear and reverse gear)
Porsche 911 (996) GT2 (2002-2005) (3rd-6th gear)
Porsche 911 (996) GT3 (2000-2005) (3rd-4th gear)
Porsche 911 (996) Turbo / S (2001-2005) (3rd-4th gear)
Porsche 911 (997) GT3 (2010-2011) (6th gear)
Porsche 911 (997) GT3 RS (2011) (6th gear)
Porsche 911 (997) GT3 RS 4.0 (2011) (6th gear)
• Position: Inside manual transmission, synchromesh ring for one of the gear sets (often 3rd/4th gear or 5th/6th depending on the gearbox).
• Function: Enables gear engagement by synchronising shaft speeds, preventing gear-grinding, facilitating smooth shifts and protecting gear teeth and synchroniser hubs.
• Applications: Ideal when the transmission is open for rebuild, when synchroniser wear is apparent (hard or noisy shifts, grinding) or when restoring a Porsche manual gearbox to high performance.
The synchroniser ring is key to proper manual gearbox operation. Over time, wear, heat and load cause the sliding surfaces to glaze or the ring teeth to degrade, leading to symptoms such as gear clash, difficult shifts, poor gear engagement or even damage to gear teeth and hubs. Replacing the synchroniser ring ensures:
• Smooth, reliable gear engagement
• Reduced gear-grinding and longer synchroniser life
• Protection for the gearbox internals from further wear
• Enhanced driving experience and drivetrain reliability
When to replace:
• The gearbox exhibits grinding when changing into a specific gear or range (often 3rd/4th or 5th/6th)
• Hard gear changes, slipping, or noise from the transmission under load
• Internal inspection shows wear or scoring on the old synchroniser ring surfaces
• You’re rebuilding the gearbox or performing a major service where opening the transmission is already necessary.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421123
The product you are viewing cross references to these numbers
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT2 RS 2011-13
The OE Match Synchroniser Ring is a replacement manual-transmission synchroniser component for selected Porsche 997 GT2 and GT2 RS models equipped with the G97.88 6-speed manual gearbox.
Price Shown Is For Each.
- Porsche 997 MK1 GT2 2008-09 (6-Speed gearbox (G97.88)
- Porsche 997 MKII GT2 RS 2011 (6-Speed gearbox (G97.88)
Diagram Ref No 5
Installed within the gearbox synchromesh assembly, the synchroniser ring helps match the rotational speeds of the gear and transmission shaft before engagement. This allows the selected gear to engage more smoothly and helps prevent grinding or gear clash.
This OE Match component is suitable for transmission rebuilding and repair where the original synchroniser ring has become worn, glazed, scored or otherwise damaged.
What This Product Does:
During a manual gear change, the gear and shaft involved may be rotating at different speeds.
The synchroniser system uses friction to bring those rotating components to a similar speed before the engagement teeth mesh.
The synchroniser ring helps:
- Match rotational speeds during gear selection
- Promote smooth gear engagement
- Reduce grinding and gear clash
- Reduce shock loading on transmission components
- Protect engagement teeth and synchroniser hubs
- Improve shift quality
- Maintain precise manual gearbox operation
Without effective synchronisation, the driver may need to use more force at the gear lever and the transmission can begin to grind during engagement.
Symptoms Of Wear Or Failure:
Synchroniser rings are friction components and gradually wear through repeated gear changes, heat and load.
Common symptoms can include:
- Grinding during gear selection
- Difficult or reluctant gear engagement
- Notchy gear changes
- Increased effort required at the gear lever
- Gear clash during faster shifts
- Difficulty downshifting
- Gear engaging more easily when shifted slowly
- Improved engagement when double-declutching
- Metallic noise during gear selection
- Inconsistent shift quality
- Visible scoring or glazing on the synchroniser surface
- Worn or damaged engagement surfaces during gearbox inspection
These symptoms can also be caused by worn dog teeth, hubs, sliding sleeves, selector components, bearings, clutch faults or incorrect gearbox oil, so proper diagnosis is important before dismantling the transmission.
Why Replacement Matters:
A worn synchroniser ring cannot match shaft and gear speeds effectively.
As the friction surface deteriorates, gear changes may become increasingly difficult and noisy.
Continued use with a badly worn synchroniser can accelerate wear to:
- Gear engagement teeth
- Synchroniser hubs
- Sliding sleeves
- Dog teeth
- Selector forks
- Associated gearbox components
Replacing the worn ring during a transmission rebuild helps restore smooth synchronisation and can help prevent damage to more expensive gearbox parts.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421130
The product you are viewing cross references to these numbers
OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth — Engagement, Smoothness, Control
OEMatch gearbox synchroniser parts are practical replacements designed for Porsche models. Synchro rings, brake bands and dog teeth restore accurate gear engagement during a rebuild or repair, reduce grinding and improve shift clarity. These items are chosen for compatibility with model-specific transmission layouts and common Porsche gearbox applications.
Available Types
- Synchro rings for specific gearsets and ratios
- Brake bands sized for particular Porsche manual transmissions
- Dog rings and dog teeth for hub engagement and selector assemblies
Understanding OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original gearbox synchroniser parts.
OE (Original Equipment) refers to parts matching original specifications for the gearbox synchroniser parts and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM gearbox synchroniser parts engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Synchroniser rings, brake bands and dog teeth coordinate rotational speed and positive engagement between gears; correct selection and installation support consistent shift feel and reduce the risk of incidental damage during use or rebuild. Material choice and heat treatment affect wear rates and contact behaviour, so matching part type to the transmission model is important.
Benefits Include
- Restores synchronisation to reduce gear noise and grinding
- Protects adjacent gearbox components by ensuring controlled engagement
- Helps maintain consistent shift effort across gears and driving conditions
Why Gearbox Syncro Ring / Brake Band / Dog Teeth Wear and Fail
- Friction surface wear from age, contamination or degraded lubricant
- Deformation or chipping of dog teeth due to aggressive shifting or impact
- Heat stress and inadequate lubrication during high-load operation
The Importance of Replacing with OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth
Replacing worn synchroniser components as part of a transmission rebuild or service reduces the likelihood of further gearbox damage and helps retain intended shift characteristics. Using parts matched to the Porsche transmission maintains mechanical clearances and engagement timing, supporting dependable operation and reducing the chance of secondary failure.
Advantages
- Replacements sized for common Porsche transmission types to aid fitment
- Heat-treated and machined materials for consistent contact behaviour
- Suitable for restorations, routine servicing and compatible performance upgrades
Support & Advice
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If you are unsure about setup, condition or backlash settings, consult a specialist with Porsche experience.
