Vehicle moves in R, but not in D or D3, or M in 1st

Probable cause(s)

1. 1st accumulator defective
2. 1st gears worn or damaged
3. 1st clutch defective

Notes

- Check the 1st clutch pressure.
- Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer and retainer seal for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage. If the discs are worn or damaged, replace the discs as a set. Inspect the clutch waved-plate height. If the height is out of tolerance, replace the waved-plate. If the discs and plates are OK, adjust the clearance with the clutch and plate.
- Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover.
- Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.