Technical Service Bulletin Scraping Noise When Operating Clutch Information

Subject: Scraping Noise When Operating Clutch Models: 911 Carr. 1987

Bulletin Number: 87 – 07

1987 Model (950 Transmission)

Scraping noise when operating the clutch or vibration in the clutch pedal could be caused by the release fork back side making contact with the release bearing.

The back of the release fork is machined from production date: January 21, 1987.

Transmission number: 74 H 048 34

When repairing cars prior to the above transmission number for scraping noise or pedal vibration when operating clutch pedal, check clutch pedal travel before removing the release fork.

Pedal travel up to the stop must be 140mm to 150mm.

Pedal travel must be measured horizontally (e.g with a measuring tape from the driver’s seat).

The pedal stop can be adjusted on the floor plate.

If there is no improvement after adjustment, replace release fork.


Important Notice: Technical Bulletins are intended for use by professional technicians, not a “Do-it-yourselfer.” They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Special tools may be required to perform certain operations identified in these bulletins. Use of tools and procedures other than those recommended in these bulletins may be detrimental to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your Porsche Dealer for information on whether your vehicle may benefit from the information. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify correct part numbers.

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