GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Excessive shock, or flares on 4-5 upshift or 5-4 downshift

    • Shift solenoid valve C inoperative
    • 2nd clutch, pressure control solenoid inoperative
    • TCC lock-up, pressure control solenoid inoperative
    • CPC valve B inoperative
    • CPC valve C inoperative
    • Foreign material in the valve body spacer plate orifice
    • Shift valve C inoperative
    • Shift valve E inoperative
    • Kick-down valve or the kick-down short valve inoperative
    • 4th accumulator inoperative
    • 5th accumulator inoperative
    • 4th clutch inoperative
    • 5th clutch inoperative
    • Inspect the MIL indicator for loose connectors
    • Inspect the O-rings, and the shift solenoid valve for seizure.
    • Inspect the 4th and the 5th 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.