Slipping 1-2 Shift

1. Low fluid level.

2. Spacer plate gaskets damaged or incorrectly installed.

3. Accumulator valve.

a. Valve sticking in valve body causing low 1-2 accumulator pressure.

b. Weak or missing spring.

4. 1-2 accumulator piston.

a. Leaking seal, broken or missing spring.

b. Leak between piston and pin.

c. Binding 1-2 accumulator piston.

d. Damaged 1-2 accumulator piston bore.

5. Intermediate band apply pin.

a. Incorrect selection of apply pin.

b. Excessive leakage between apply pin and case.

c. Apply pin feed hole not completely drilled.

6. Intermediate servo assembly.

a. Porosity in piston.

b. Damaged or missing cover to servo oil seal ring.

c. Leak between servo apply pin and case.

7. Improperly adjusted throttle valve cable.

8. Throttle valve binding, causing low throttle valve pressure.

9. Bindin9 throttle valve limit valve.

10. Line bias valve sticking, causing low line pressure.

11. Worn or burned intermediate band.

12. Case porosity in 2nd clutch passage.