Technical Service Bulletin Hard Shifting 1st and 2nd gear, Reverse Fork

Subject: Hard Shifting 1st and 2nd Gear: Reverse Gear Operating Fork Models: 911 Turbo

Bulletin Number: 87 – 02

When replacing 911 Turbo transmissions for hard shifting of 1st and 2nd gears, the reverse gear operating fork (figure 1) should be checked for damage or distortion.

The fork should be replaced if it is bent or not symmetrical. See figure 2.

An asymmetrical or bent fork can put pressure on the detent between the reverse gear shift rod and the 1st and 2nd gear shift rod resulting in 1st and 2nd gear hard shifting.

The reverse gear operating fork material thickness was increased from 3.5 to 4.5mm.

From Production Date: October 9, 1987.

Transmission numbers:

                930.361 J 00 641

                930.361 J 10 997

(limited slip differential)

New Part Numbers:

Operating fork: 930.303.019.01

Pivot pin:             930.303.123.01

When replacing the operating fork on transmissions prior to the above transmission numbers pivot pin must also be replaced.

It might be necessary to remove material from the inside of the front transmission cover in the area of the reverse gear fork to obtain sufficient clearance.

Shift transmission into reverse several times before installing in vehicle to ensure reverse gear fork does not contact the housing.

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, 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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