GM Service Manual Online
For 1990-2009 cars only

SUBSTITUTE OIL PUMP COVER TO CASE BOLT-THM125

BEGINNING LATE MAY 1981, SOME THM 125 TRANSMISSIONS WERE BUILT WITH A SUBSTITUTE PUMP COVER TO CASE BOLT. SEE FIGURE 1 FOR BOLT LOCATION. THE STANDARD PUMP COVER TO CASE BOLT IS AN M8 X 1.25 X 105 BOLT, PART NO. 8637266, AND THE SUBSTITUTE BOLT IS AN M8 X 1.25 X 100 BOLT, PART NO. 11501048, USED WITH TWO (2) STANDARD STEEL WASHERS 1.5MM THICK. SERVICE INFORMATION 1.IF THE SUBSTITUTE PUMP COVER TO CASE BOLT AND WASHERS ARE REMOVED FROM ANY TRANSMISSION, BE CERTAIN TO USE THE TWO (2) WASHERS DURING REASSEMBLY. FAILURE TO USE THE TWO (2) STANDARD STEEL WASHERS ON THE M8 X 1.25 X 110 BOLT MAY RESULT IN INTERFERENCE BETWEEN THE CONVERTER AND THE PUMP COVER TO CASE BOLT. 2.AFTER REASSEMBLING A THM 125 TRANSMISSION CONTAINING THE SUBSTITUTE PUMP COVER TO CASE BOLT, INSTALL THE TORQUE CONVERTER AND CHECK FOR INTERFERENCE BETWEEN THE CONVERTER AND THE PUMP COVER TO CASE BOLTS. 3.WHEN INSTALLING ANY PUMP COVER TO CASE BOLT, BE CERTAIN TO USE THREAD SEALER ON THE BOLT THREADS AND TORQUE TO 20 N.M (15 FT.-LBS.)

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.