PUMP BODY OIL SEAL ASSEMBLY THM 700-R4: APPLY LOCTITE

ALL 1982-85 LIGHT DUTY WITH 700-R4 AUTOMATIC TRANSMISSIONS

When replacing the pump body oil seal, P/N 8630921, on all THM 700-R4 transmissions, it is recommended that Loctite TM RC/609, or its equivalent, be used. This compound, when applied according to the manufacturer's instructions, will aid in the retention of the seal in the pump body.

NOTE: IT IS EXTREMELY IMPORTANT THAT DURING THE APPLICATION OF THIS COMPOUND TO THE SEAL AND BORE THAT EXCESS COMPOUND DOES NOT GET INTO THE OIL DRAINBACK PASSAGE (SEE FIGURE NO. 1).

Use the following steps as a guide, along with the proper service manual, for the removal and installation of the oil seal.

1. Pry out old seal using a screwdriver or suitable puller.

2. Inspect the seal bore for the following:

A. Porosity or cracks - replace the pump body if either of these conditions are found.

B. Nicks or burrs - use crocus cloth to polish, but do not enlarge the bore.

3. Clean the seal bore with a suitable solvent to insure that it is free of dirt and oil.

4. Apply Loctite TM RC/609, or equivalent, to the mating surfaces of the new seal and seal bore per the sealant manufacturer's instructions.

5. Install the new seal using tool J-25016.

6. Inspect the seal to insure that it is properly seated and the garter spring is in place.

7. Allow the compound to fully cure according to the sealant manufacturer's recommendations.

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.