Vehicle Moves In D, D3, 2, and 1, But Not In R

Vehicle moves in D, D3, 2, and 1, but not in R

Diagnostic Procedure:

1. Shift solenoid valve D defective

2. Shift fork shaft stuck

3. Shift valve D defective

4. 5th/reverse accumulator defective

5. 5th clutch defective

6. Reverse gears worn or damaged

Also check for:

- Test the shift solenoid valve function with the HDS.
- Inspect shift solenoid valve D for seizure, and the O-rings for wear and damage.
- Check for a missing shift fork bolt on the shift fork shaft.
- Inspect the servo valve O-ring.
- Check the shift fork shaft detent for wear and damage.
- Inspect the 5th accumulator piston, the O-ring, and the spring for wear and damage in the servo body.
- Check the 5th clutch pressure. A/T Pressure Test
- Inspect the mainshaft and the 5th clutch for wear and damage.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
- Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the countershaft 5th gear and the reverse gear. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes clicking, grinding, whirring noise, also replace the mainshaft 5th gear, the reverse idler gear, and the countershaft 5th gear.