Syncro ring 1st/2nd Gear. Porsche 911 / 964  ❭  95030431102

1st & 2nd Gear Synchro Ring 
Sold each - 2 required per car

Restore precise gear selection and smooth shifting with this OE Match 1st & 2nd Gear Synchro Ring. Manufactured to replicate the original factory specification, this direct replacement on G50 manual transmissions, helping to restore crisp gear engagement and prolong gearbox life.

Fits:

• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1 1989 3.3L Turbo (930) G50
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93  

Diagram Ref no 32

Whether you're carrying out a complete transmission rebuild or replacing worn synchroniser components, this OE Match synchro ring delivers the fit, function and reliability expected from an original-style replacement.

What Does the Synchro Ring Do?

The synchro ring is one of the most important wear components inside the manual gearbox.

Its primary functions include:

• Matching the rotational speed of the selected gear and the gearbox shaft before engagement.
• Allowing smooth gear changes without gear clash.
• Reducing wear on gear teeth and engagement hubs.
• Improving shift quality and driver confidence.
• Helping protect internal gearbox components from excessive wear.

A correctly functioning synchro ring is essential for the smooth, precise shift quality that Porsche G50 gearboxes are known for.

Why Do Synchro Rings Fail?

Synchroniser rings are designed as wear components and gradually lose effectiveness through normal operation.

Common causes of failure include:

• Normal wear from repeated gear changes.
• Aggressive or high-performance driving.
• High mileage. Poor lubrication or degraded gearbox oil.
• Excessive heat generated within the transmission.
• Incorrect shifting techniques causing premature wear.

As the friction surface wears, the synchroniser can no longer effectively match gear speeds, resulting in increasingly difficult gear engagement.

When Should They Be Replaced?

Replacement is recommended when:

• First or second gear becomes difficult to engage.
• Gear changes produce grinding or crunching noises.
• The gearbox jumps out of gear under load.
• Shift quality deteriorates, particularly when cold.
• Carrying out a complete gearbox overhaul.
• Replacing worn synchroniser hubs, sleeves or bearings.
• Rebuilding a high-mileage or performance transmission.

As gearbox disassembly is required, replacing synchro rings alongside other wear components is considered best practice during a transmission rebuild.

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