Initial Inspection and Diagnostic Overview

Inspection and Verification

CAUTION: The oil-to-air (OTA) fluid cooler is not repairable with existing equipment due to the thermostatic bypass valve. Do not attempt to backflush and clean the OTA fluid cooler. Install a new OTA fluid cooler if there is leakage from the OTA fluid cooler, major metallic failure, multiple clutch or clutch plate failure, sufficient component wear that results in metallic contamination.

CAUTION: When internal wear/damage occurs in the transmission, metal particles, clutch plate material and band material can travel into the torque converter, the fluid cooler tubes and the OTA fluid cooler. These contaminants are a major cause of recurring transmission concerns. To prevent future concerns, remove these contaminants from the cooling system before placing the transmission back into use.

1. Visually inspect for obvious signs of mechanical damage, incorrect component installation, and system leaks. Repair as necessary.
2. If the fault is not visually evident, GO to Symptom Chart. Symptom Related Diagnostic Procedures