Synchro shifting sleeve 1st/2nd gear. Porsche 911 1974-86 (915 Gearbox)  ❭  93030241103

Synchro Shifting Sleeve 1st/2nd Gear. 
The OE Match Synchro Shifting Sleeve, 1st/2nd Gear is a high-quality replacement transmission component designed to facilitate the engagement of first and second gears within Porsche manual gearboxes. Manufactured to OE specifications for fit, precision and durability, this shifting sleeve forms a critical part of the synchroniser assembly, ensuring smooth, accurate and reliable gear selection.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 42

Working in conjunction with the synchroniser hub, synchro rings and dog teeth, the shifting sleeve slides across the synchroniser assembly to engage the selected gear once rotational speeds have been synchronised. Precision machining and correct fitment are essential for maintaining shift quality, reducing gearbox wear and ensuring dependable transmission performance.  

What This Product Does:

• Engages first and second gears within the gearbox.
• Works with the synchroniser assembly to enable smooth gear changes
• Transfers movement from the gear selector mechanism to the selected gear.
• Helps ensure accurate and positive gear engagement.
• Supports proper synchronisation before gear selection.
• Reduces gear clash and transmission wear.
• Contributes to smooth manual gearbox operation and drivability.

Symptoms Of Wear Or Failure:

• Difficulty engaging first or second gear.
• Gear grinding or crunching during shifts.
• Notchy or inconsistent gear changes.
• Excessive resistance when moving the gear lever.
• Gear disengagement or jumping out of gear under load.
• Poor shift quality and reduced transmission precision.
• Increased gearbox noise during gear changes.
• Visible wear, chipping or rounding of engagement surfaces during inspection.

Why Replacement Matters:

• The synchro shifting sleeve experiences repeated mechanical loading every time first or second gear is selected. Over time, the engagement surfaces can wear, become rounded or suffer damage, reducing the sleeve's ability to engage gears cleanly and securely.
• A worn shifting sleeve can compromise gear engagement, place additional strain on synchroniser rings and dog teeth, and accelerate wear throughout the gearbox. If left unresolved, continued operation may lead to increasingly poor shift quality and more extensive transmission repairs.
• Replacing a worn synchro shifting sleeve restores accurate gear engagement, improves transmission performance and helps protect other synchroniser components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring smooth and reliable shifting performance for your Porsche manual transmission.

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93030241103

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