Slips In Forward Drive Positions

1. Hydraulic pressures too low.
2. Valve body malfunction or leakage.
3. Low oil level.
4. Incorrect gearshift control linkage adjustment.
5. Clogged oil filter.
6. Faulty oil pump.
7. Worn or broken input shaft seal rings.
8. Aerated fluid.
9. Incorrect throttle linkage adjustment.
10. Overrunning clutch not holding.
11. Worn or faulty rear clutch.
12. Overrunning clutch worn, broken or seized.