17-20. CENTER SUPPORT REPAIR (4L80-E) (Cont'd)
The center support bolt hole can be reconditioned ONE TIME
ONLY using a reamer and a new service bolt. This is an
1997-1998 transmission center supports are shown. The 1995-1996
transmissions are similar.
3.1. Insert, do not force, gauge pin with chamfer end towards hole in bolt hole (4.1). If gauge pin fits in
hole at least half way, go to step 3.2. If half way or more, replace center support (2).
3.2. Position reamer in bolt hole (4.1) and using light pressure, turn clockwise approximately 4-6 times
or until reamer bottoms out. Remove reamer and clean center support (2).
4. Check all oil passages in center support (2) for blockage.
5. Inspect release springs (10) for signs of distortion or collapsed coils. Replace all springs (10) if any
have distorted or collapsed coils.
6. Inspect clutch piston (6), spring and retainer (9), and snapring (5) for damage or distortion. Replace
any part if damaged or distorted.