Slips 1-2 Shift

1. Incorrect oil level.
2. Vacuum modulator valve sticking.
3. Vacuum modulator defective.
4. Pump pressure regulator valve defective.
5. Porosity between channels in case.
6. Control valve assembly.
7. Pump-to-case gasket may be incorrectly positioned.
8. Intermediate clutch plug in case may be missing or leaking excessively.
9. Intermediate clutch piston seal mission or damaged.
10. Intermediate clutch plates burned.
11. Front or rear accumulator oil ring may be damaged.