Second Coast Clutch Piston Travel Measurement

Tools Required

• J 45166  8" Dial Indicator Extension Rod. See Special Tools .
• J 45200  Dial Indicator Set. See Special Tools .

Fig 1: Measuring Second Coast Clutch Piston Stroke
Courtesy of GENERAL MOTORS CORP.
CAUTION: Wear safety glasses when using compressed air in order to prevent eye injury.
1. Using the same special tool setup used to measure the second clutch piston travel, relocate the dial indicator onto the second coast clutch piston and zero the dial indicator.
2. Apply compressed air into the second coast clutch fluid passage (B1) and measure the piston stroke. Be sure the piston moves smoothly.
3. If the piston stroke is out of specifications, select another second coast clutch backing plate. Refer to Second Coast Clutch (B1), Piston Bore Stroke in Transmission Clearance Specifications .
4. Remove the tools.
5. Install the remaining M6 x 1.0 x 14.5 mm fluid pump cover bolt/screw (231) into the hole where J 45166  (2) was located. See Special Tools .

   Tighten:  Tighten the fluid pump cover bolt/screw (231) to 9.8-13.7 N.m (86.64-121.20 lb in).

Fig 2: View Of Coast Clutch Spring & Hub Thrust Washer
Courtesy of GENERAL MOTORS CORP.
6. Apply transmission assembly gel to the coast clutch hub thrust washer (226).
7. Install the coast clutch hub thrust washer (226) with the flat surface facing up, and with the tangs engaged into the second cost clutch spring (224).