Input Carrier Assembly (470)

Inspect for worn or stripped ring gear splines

Case Assembly (51)

• Check the engine for diagnostic codes. If the engine controller signals the transmission that engine torque is inaccurate, the transmission will command high line pressure.
• Check line pressure at idle is below 800 kPa.
• Inspect for stuck valves in the lower valve body, particularly the boost valves.
• Inspect for damaged or fatigued 1‑2‑3‑4 clutch wave plate (458) and low and reverse clutch wave plate (450).
• Inspect for stripped or worn splines on 1‑2‑3‑4 clutch plate (456).
• Inspect for improperly positioned or plugged low reverse piston (408) air bleed.
• Inspect for correct fluid level.

Low and Reverse Clutch Assembly (OWC) (455)

Inspect for stripped or sheared internal and external splines on the low and reverse clutch assembly (455).