GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Excessive shock, or flares on 1-2 upshift or 2-1 downshift

    • Foreign material in the spacer plate orifice
    • 2nd accumulator inoperative
    • 2nd check ball stuck
    • 2nd clutch inoperative
    • Inspect the 1st and the 2nd clutch pressures.
    • Inspect the clutch piston and the O-rings.
    • Inspect the clutch piston return 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