Direct Clutch Piston Travel Check

Tools Required

• J 8001  Dial Indicator Set. See Special Tools .
• J 7057  Dial Indicator Plunger Extension. See Special Tools .

1. Attach the J 7057  (not visible in the illustration) to the J 8001-3  . See Special Tools .
2. Using the J 8001-1  , mount the J 8001-3  to the transmission case through the opening in the case barrel. Place the J 7057  onto the direct clutch piston assembly. See Special Tools .
   Fig 1: Illustrating J 8001-3 Installed In Transmission Case

   Courtesy of GENERAL MOTORS CORP.
3. Index the J 8001-3  . Set the dial to 0.
4. Apply 80 psi of air pressure to the direct clutch fluid passage (3rd/Reverse), in the case bottom, in order to actuate the direct clutch piston. Refer to Fluid Passages , Case Fluid Passages illustration.
5. Measure the direct clutch piston travel.

   Piston Travel Specification:  The piston travel should be 1.27-4.369 mm (0.050-0.172 in).

6. Remove the tools.