FLUID LEAK NEAR GOVERNOR AREA CAUSED BY POROSITY

MODELS AFFECTED: 1989 REGAL, CENTURY AND RIVIERAS

BULLETIN COVERS (Figure 1)

A fluid leak near the governor area on a 1989 Regal, Century, Electra or Riviera equipped with a THM 440-T4/HYDRA-MATIC 4T60 may be caused by porosity allowing fluid to seep out of the case.

SERVICE PROCEDURE (Figure 2)

If the transaxle has a leak near the governor area, inspect the case die number as shown in Figure 2. If the die number is 567 and the VIN is within the following breakpoints listed under "Vehicles Involved", then replace the transaxle case.

SERVICE PARTS INFORMATION

Part Number Description Model Year Model Usage ----------- ----------- ---------- ----------- 8662928 Pkg., Transaxle Service 1989 All Case Assembly Complete

Parts are currently available from GMSPO.

SERVICE MANUAL REFERENCE

Refer to the appropriate 1989 Service Manual for proper procedures.

VEHICLES INVOLVED

Involved are certain cars built within the following VIN breakpoints:

Model Assembly Year Model Body Car Line Plant From Through ---- ----- ---- -------- ----- ---- ------- 1989 Buick E Riviera Hamtramck KU418301 KU419540

1989 Buick A Century Framingham KG412549 KG413122

1989 Buick A Century Oklahoma Cty K6427386 K6429870

1989 Buick W Regal Oshawa #2 K1470258 K1470941

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.