GM Service Manual Online
For 1990-2009 cars only

TRANSMISSION THM 475 CASE STUDS REPLACE WITH BOLTS

STARTING SEPTEMBER 20, 1984 (JULIAN DATE 264), ON THE THM 475 EV, FI, FS AND HR MODELS FOUR OF THE SIX STUDS IN THE REAR CASES EXTENSION WERE REPLACED WITH 4 BOLTS AS ILLUSTRATED BELOW. WHEN SERVICING ANY OF THE MODELS LISTED ABOVE WHICH HAVE THE SIX STUDS AND REPLACEMENT IS REQUIRED, REPLACE THEM WITH BOLTS, P/N 9424320.

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.