GM Service Manual Online
For 1990-2009 cars only

1-2 Shift Feel - Harsh or Soft

Checks

Cause

Oil Pressure

Refer to Causes of High or Low Oil Pressure

1-2 Accumulator Piston, Cover, and Springs

    â€¢ Improperly torqued cover bolts
    â€¢ Damaged piston or seal
    â€¢ Damaged spring
    â€¢ Damaged or mispositioned gaskets
    â€¢ Low torque of bolts
    â€¢ Piston and Springs installed upside down

Control Valve Assembly

    â€¢ Stuck 1-2 Accumulator valve
    â€¢ Mislocated or missing 1-2 Accumulator bushing retainer

#2 Checkball

Mislocated

Driven Sprocket Support

    â€¢ Rolled or twisted seal for the driven sprocket support ring
    â€¢ Worn sleeve in the second clutch housing

Fluid Level

Low

Filter

Cracked or damaged