Pinion shaft bearing. Porsche 964 /993 / 996 Turbo / 996 GT3  ›  99905222701

Pinion shaft bearing
OE Match pinion shaft bearing for selected Porsche 964, 993, 996 Turbo and 996 GT3 transmissions. Supplied diagram information identifies a four-point or angular-contact bearing measuring 40 × 82 × 18 mm.

Fits:

• Porsche 964 1989 - 1994
• Porsche 993 1995 - 1998
• Porsche 996 Turbo 2001 - 2005
• Porsche 996 GT3 1999 - 2005

Diagram Ref no 25

What This Product Does

This gearbox bearing supports the rotating pinion shaft and helps maintain its position within the transmission. Correct bearing condition is important for shaft alignment and controlled rotation under load.

Functions

• Supports pinion shaft rotation.
• Helps keep the shaft correctly located.
• Limits friction at the bearing interface.

Symptoms of Fault

Possible signs include speed-related whining, rumbling, excessive shaft movement or metallic debris in gearbox oil. These symptoms require diagnosis: clutch, linkage, mounts and lubrication faults can produce similar complaints.

Why Replacement Matters

Renewing a worn bearing helps address unwanted shaft movement and rough rotation during transmission repairs. Inspect neighbouring bearings, gears, seals and retaining components during dismantling rather than assuming this bearing alone explains every symptom.

FAQs

Can just one bearing be renewed?
It may be appropriate after inspection, but the condition of the remaining transmission components should guide the repair.

Does gearbox oil specification matter?
Yes. Use the lubricant specified for the particular transmission; changing oil does not repair mechanical bearing damage.

How should compatibility be checked?
Compare reference 99730229300, the vehicle details and the gearbox code before selecting the bearing.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99905222701

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