Vehicle Moves In D and R, But Not In 1st In S

Vehicle moves in D and R, but not in 1st in S

Diagnostic Procedure:

1st-hold clutch defective

Also check for:

- Check the 1st-hold clutch pressure. A/T Pressure Test
- Inspect the 1st-hold 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 clutch plate B 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 clutch wave-plate height is out of the tolerance, replace the clutch wave-plate.