Soft or Slipping 4-3 Shift

SOFT OR SLIPPING 4-3 SHIFT
1. Powertrain control system electrical inputs and outputs, wiring harnesses, Powertrain Control Module (PCM), shift solenoids, and transmission range sensor.
2. Faulty main control valve body.
3. Intermediate/OD band, servo piston, rod bore, rod, or spring damaged.
4. Direct clutch assembly damaged.
5. Forward coast clutch assembly damaged or worn.
6. Leaking air pressure in servo apply and servo release circuits.