OIL LEAKAGE INTO I/P CLUSTER (NEW STYLE SPEEDO DRIVEN GEAR)
SUBJECT: OIL LEAKAGE INTO INSTRUMENT CLUSTER (REPLACE PARTS SHOWN IN BULLETIN)
VEHICLES AFFECTED: 1985-91 M-CAR
CONDITION:
--------- Oil may leak into the instrument cluster on some 1985-91 M cars. In severe instances, the oil could drip onto the carpet or the driver's clothing.
CAUSE:
----- The oil used to lubricate the speedometer cable cannot drain back into the transmission because of the design of the driven gear sleeve. The new style has an oil drain hole added.
CORRECTION:
---------- Replace the parts shown in the illustration, following the instructions in Section 7B of the Service Manual. Although the sleeve (#1) is the only revised part, all the parts should be replaced to prevent any remaining oil from getting into the cluster again. In rare instances, the instrument cluster and/or carpet may also have to be replaced.
INSTALLATION PRECAUTIONS:
- Be certain the oil seal is fully seated and square to the bore.
- Be certain the slotted end of the driven gear has no sharp edges that might damage the seal when installing.
- Lubricate driven gear and "O" ring seal.
PARTS INVOLVED:
1. Speedometer driven gear sleeve - 96066895
2. Speedometer driven - M/T 96060271 - A/T 96060272 3. Oil Seal - M/T 96064510 - A/T 96051417 4. Pin 96059915
5. "O" Ring Seal 96059932
6. Speedometer Cable 30003204
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
