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Gearbox Syncro Ring / Brake Band / Dog Teeth
By OE Match
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
Fits:
Porsche 996 C2 / C4 1998-05 (G96.00/30 G96.01/30) 6-Speed Manual Transmission
Porsche 986 Boxster S 1997-04 (G86.20) 6- and 5-speed Manual transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630404100
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
Fits:
Porsche 996 C2 / C4 1998-05 (G96.00/30 G96.01/30) 6-Speed Manual Transmission
Porsche 986 Boxster S 1997-04 (G86.20) 6- and 5-speed Manual transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630404101
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
OE Match-quality synchronizer ring (synchro ring) - designed for use inside the manual transmission gearbox of various Porsche 6-speed models. It is engineered to meet the original Porsche specification, providing a direct-fit, high-precision replacement part for smooth gear engagement.
Sold each.
Fits:
All 6 Speed Manual Gearbox
Porsche 986 Boxster S 2000 - 2005
Porsche 996 C2 / C4 1998 - 2005
Diagram Ref No. 3
The synchronizer ring (also called a synchro ring) helps smoothly engage gears during shifting - especially between 1st and 2nd gears - by matching the rotational speeds of the gears and shafts before the gear teeth mesh. This prevents gear grinding, reduces wear, and provides a more refined shifting feel. If a synchronizer ring becomes worn or damaged, you may experience rough shifts or difficulty selecting gears.
Function
• Speed Matching: Helps equalize speeds of the gear and shaft before engagement.
• Friction Control: Uses friction material surfaces to slow or speed parts for smooth engagement.
• Shift Quality: Promotes quieter, smoother shifting with reduced gear clash.
• Gearbox Protection: Reduces wear on gears and synchro components by facilitating correct engagement.
Synchro rings are subject to wear over time, especially under regular spirited driving or heavy use. Worn synchro rings can lead to:
• Gear grinding when shifting
• Difficult gear engagement
• Increased transmission wear Harsh or noisy shifts
Replacing a worn synchronizer ring with an OE Match part restores intended gearbox function, improves shift quality, and helps protect other internal transmission components from accelerated wear.
Replace this synchronizer ring if you experience:
• Grinding or crunching when shifting between gears
• Difficulty selecting certain gears
• Gear shifts that feel stiff or reluctant
• Noisy transmission operation during shifts
• Symptoms during gearbox rebuild or overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030461720
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
The OE Match Synchro Cone Ring is a replacement manual-transmission synchroniser component for the 1st and 2nd gear synchromesh assembly on selected Porsche 986 Boxster S and 996 Carrera models.
Fits:- Porsche Boxster S 986 3.2L 2000-02 (6-Speed Manual)
- Porsche Boxster S 986 3.2L 2003-04 (6-Speed Manual)
- Porsche 996 C2 3.4L 1997-08/01 (6-Speed Manual)
- Porsche 996 C4 3.4L 1997-08/01 (6-Speed Manual)
Diagram Ref No 4
Located inside the gearbox, the cone ring uses friction to help equalise the rotational speed of the selected gear and transmission shaft before the engagement components lock together.
This process is essential for smooth gear selection and helps prevent grinding, crunching and excessive shock loading during shifts.
The OE Match replacement is suitable for gearbox rebuilding or repair where the original cone ring has become worn, glazed, scored or otherwise unable to provide effective synchronisation.
What This Product Does:
When the driver changes gear, the selected gear and transmission shaft may be rotating at different speeds.
Before the gear can engage cleanly, the synchroniser assembly must bring those speeds together.
The synchro cone ring helps:
- Synchronise rotational speeds before gear engagement
- Support smooth selection of 1st and 2nd gear
- Reduce crunching and gear clash
- Reduce shock loading during gear changes
- Protect the operating sleeve and engagement teeth
- Improve gear-change precision
- Reduce the effort required to select a gear
- Maintain reliable manual transmission operation
The cone ring works as part of a complete synchroniser assembly rather than operating independently. Correct operation also depends on the condition of the synchroniser rings, guide sleeve, dog teeth, gears and selector components.
Symptoms Of Wear Or Failure:
Common symptoms of a worn 1st/2nd gear synchro cone ring can include:
A worn synchroniser system may also be associated with 2nd gear pop-out, but this symptom should not automatically be attributed to the cone ring alone. The guide sleeve, gear engagement teeth, synchroniser rings, selector mechanism and other gearbox components may also contribute.
Why Replacement Matters:
A worn cone ring cannot synchronise the selected gear quickly enough before engagement.
If the gearbox continues to be used with poor synchronisation, repeated gear clash can accelerate wear to other transmission components.
Potential secondary damage can affect:
- Gear engagement teeth
- Dog teeth
- Guide / operating sleeve
- Synchroniser rings
- Selector components
- Gear wheels
- Associated transmission parts
Replacing a worn cone ring as part of a correctly diagnosed gearbox repair helps restore smooth synchronisation and can prevent further deterioration of more expensive components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630461320
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Fits:
Porsche 996 (6 speed) 1998 model only 6 teeth for 1st/2nd gears
Diagram Ref No. 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030461120
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Fits:
Porsche 986 Boxster S 2000-04 (6 speed)
Porsche 996 (6 speed) 1999>> 7 teeth for 1st/2nd gears
Diagram Ref No. 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630461100
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Sold each.
Fits:
All 6 Speed Manual Gearbox
Porsche 986 Boxster S 2000>>
Porsche 996 C2 / C4 1998-05
Diagram Ref No. 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630441100
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche 993 (911) RS 1994-97
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Fits:
Porsche 911 (993) RS 1995 (M003)
Porsche 996
Porsche 986 S
Click 'Zoom in' for large parts diagram.
Diagram ref no 33
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030461111
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.
