Rough 1-2 Shift

1. Modulator valve sticking.

2. Modulator assembly defective.

3. Pump pressure regulator or boost valve stuck or inoperative.

4. Control valve assembly loosened from case, damaged or mounted with wrong gaskets.

5. Intermediate clutch ball missing or not sealing.

6. Porosity between channels in case.

7. Rear servo accumulator assembly may have oil rings damaged, stuck piston, broken or missing spring or damaged bore.