FORWARD/TILTMASTER LUBRICANTS (REVISION TO LUBE SPEC.)

PAGE OB-14 IN THE W-4 SECTION OF THE 1986-1987 W-SERIES SERVICE MANUAL LISTS INCORRECT LUBE SPECIFICATIONS FOR MANUAL TRANSMISSIONS AND REAR AXLES. THE CORRECT SPECIFICATIONS ARE AS FOLLOWS:

MANUAL TRANSMISSION - SF ENGINE OIL

. SAE 5W-30 BELOW 32 DEGREES C (90 DEGREES F) . SAE 40 ABOVE 32 DEGREES C (90 DEGREES F)

REAR AXLE - GL-5 GEAR OIL

. SAE 80W BELOW 10 DEGREES C (50 DEGREES F) CONSISTENTLY . SAE 90 18-32 DEGREES C (65-90 DEGREES F) CONSISTENTLY . 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.