GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Vehicle moves in D, I and R, but not in the L position

    • Coast clutch accumulator inoperative
    • Coast clutch inoperative
    • Inspect the coast clutch pressure.
    • Inspect the 1st/2nd clutch shaft and the 1st/coast clutch assembly for wear and damage.
    • Inspect the coast clutch piston and the O-rings.
    • Inspect the spring retainer for wear and damage.
    • Inspect the clutch backing plate-to-top disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage. If the discs and plates are worn or damaged, replace the discs and plates as a set. If the discs and plates are in satisfactory condition, adjust the clutch backing plate clearance.