Soft or Slipping 3-4 Shift

SOFT OR SLIPPING 3-4 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. Leaking air pressure in servo apply and servo release circuits.