GM Service Manual Online
For 1990-2009 cars only

Harsh Shifts

Checks

Causes

Line Pressure

High (Refer to High or Low Line Pressure )

Checkballs (26)

Missing; no orificed apply

Accumulators

    • Springs or piston binding; no accumulation
    • Accumulator valve is stuck

Clutch Housing Retainer and Ball Assemblies

Plugged