Technical Service Bulletin Reverse Idler Shaft Update

Subject: Reverse Idler Shaft Update                 Models: 911 Turbo

Bulletin Number: 89 – 01

Model Year 1989 with G50/50 Transmission

A modified reverse gear idler shaft was installed from transmission numbers:

                                G50/50 1K 0575

                                G50/50 2K 1113 (limited slip differential)

When repairing reverse gears before the above mentioned transmission numbers the following parts should be installed:

Reverse idler shaft:         PN 950.302.228.03 (arrow 1)

1 thrust washer:               PN 950.302.297.10 (arrow 2)

2 thrust washers:             PN 950.302.297.12 (arrows 3)

The early version idler shaft PN 950.302.228.02 must no longer be used.

Important Notice: Technical Bulletin 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 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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