GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Late shift from the N position to the R position, or excessive shock when shifting into gear

    • Shift solenoid valve C inoperative
    • 2nd clutch, pressure control solenoid inoperative
    • TCC lock-up, pressure control solenoid inoperative
    • Shift cable broken or out of adjustment
    • Joint in the shift cable and the transmission or the body worn
    • Input speed sensor inoperative
    • Output shaft speed sensor inoperative
    • ATF temperature sensor inoperative
    • Reverse shift fork shaft stuck
    • CPC valve C stuck
    • Reverse CPC valve inoperative
    • Foreign material in the spacer plate orifice
    • Shift valve E inoperative
    • 5th accumulator inoperative
    • 5th clutch inoperative
    • Inspect the MIL indicator for loose connectors.
    • Inspect the O-ring, and the shift solenoid valve for seizure.
    • Inspect the valve body gasket of the AT clutch pressure control solenoid.
    • Inspect the ATF feed pipes for wear and damage.
    • Inspect the CPC valves if the AT clutch pressure control solenoid valve is stuck.
    • Inspect for a loose shift cable at the shift lever and the transmission control shaft.
    • Inspect the 5th clutch pressure.
    • Inspect the clutch piston, the clutch piston check valve, 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.