FORWARD/TILTMASTER LUBRICANTS (REVISION TO LUBE SPEC.)

SUBJECT: FLUIDS AND LUBRICANTS

MODELS: 1986-87 W-4 FORWARD/TILTMASTER

Page OB-14 in the W-4 section of the 1986-87 W-Series Service Manual lists incorrect lube specifications for manual transmissions and rear axles. The correct specifications are as follows:

MANUAL TRANSMISSIONS - SF ENGINE OIL

o SAE 5W-30 below 32 degrees C (90 degrees F).

o SAE 40 above 32 degrees C (90 degrees F).

REAR AXLE - GL-5 GEAR OIL

o SAE 80W below 10 degrees C (50 degrees F) consistently.

o SAE 90 18-32 degrees C (65-90 degrees F) consistently.

o SAE 140W above 10 degrees C (50 degrees F) consistently.

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.