K 2500 Truck 4WD V6-262 4.3L (1988)
Clutch: All Technical Service Bulletins
A/T - Burned Forward/Direct Clutchs
GMC NUMBER:
88-T-92
GROUP:
7A - Automatic Transmission
DATE:
March, 1988
CORPORATE
NUMBER:
877119R
SUBJECT:
BURNED FORWARD AND/OR DIRECT CLUTCH PART INFORMATION ON A NEW CENTER SUPPORT BOLT
MODELS:
ALL L.D. VEHICLES EQUIPPED WITH THM 400-475 (RPO M40) AUTOMATIC TRANSMISSION
BULLETIN COVERS:
Conditions of a burned forward and/or direct clutch may be caused by a loose center support bolt. A new center support bolt has gone into production to
help increase torque retention.
DATE OF PRODUCTION CHANGE:
Beginning December 14, 1987 (Julian Date 348) all THM 400/475 transmissions were built with the new bolt.
SERVICE ACTION:
When ordering an updated support package from GMSPO the new bolt will be included. The bolt must be installed whenever replacement of the center
support is required.
If the bolt is not in the center support package, then purchase the new bolt separately. Refer to Service Parts Information.
SERVICE PARTS INFORMATION:
Part No.
Part Description
*8629916
THM 400/475 Package-Center
Support and Race Assembly
*8625990
THM 400 Package-Center Support
and Race Assembly
8670757
Bolt-Case to Center Support
*Refer to the service parts list for correct model applications.
