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- 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.
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Sold each.
Fits:
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Diagram ref no 3
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