GM Service Manual Online
For 1990-2009 cars only

Inspection Procedure

Important:  When the overrun clutch is checked, the air will blow by the forward clutch piston lip seals and exit out of the forward clutch feed hole in the turbine shaft.


Object Number: 7851  Size: SH

Apply air to the feed holes in the turbine shaft in order to check the following items:

  1. The 3rd and 4th clutch
  2. The forward clutch
  3. An overrun clutch