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Gearbox Syncro Ring / Brake Band / Dog Teeth
By OE Match
- 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
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
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 Turbo 1975-88 4 speed
Diagram ref no 12.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030230300
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
2 per gearbox
Fits:
Porsche 911 Turbo 1975-77
Click 'Zoom in' to see the diagram.
Diagram ref no 45
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030241100
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.
