Vehicle moves in 2 and R, but not in 1st in D, D3, S, or 1
Check the 1st clutch pressure.
Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body.
Inspect the countershaft, secondary shaft, and 1st clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and 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 plates for wear and damage, and inspect the clutch wave-plate height. If the discs and 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.
1st accumulator defective
1st gears worn or damaged
1st clutch defective