Low fluid

Add fluid.

Shift select cable out of adjustment, biding or damaged

Adjust or replace the shift select cable.

Manual valve binding or sticking

Inspect the valve body.

Throttle valve binding or sticking

Inspect the valve body.

Shift Solenoid Inoperative

Inspect the valve body shift solenoids.

Accumulator(s) pistons damaged or leaking

Inspect the accumulator pistons.

Accumulator(s) seals cut or damaged

Inspect the accumulator seals.

Accumulator(s) broken or distorted springs

Inspect the accumulator springs.

Incorrect line pressure

Perform the line pressure diagnosis.