Initial Inspection and Diagnostic Overview

Transmission Cooling

NOTE: Whenever a transmission has been disassembled to install new parts, a new transmission fluid cooler must be installed and the transmission fluid cooler tubes must be cleaned and backflushed.

NOTE: Cleaning and backflushing the transmission fluid cooling system, along with normal cleaning and inspection procedures as outlined during disassembly and reassembly, will keep contamination from re-entering the transmission and causing a repeat repair. When internal wear or damage has occurred in the transmission, metal particles, clutch plate material or band material may have been carried into the torque converter and transmission fluid cooler. These contaminants are a major cause of recurring transmission issues and must be removed from the system before the transmission is put back in use.

Inspection and Verification

When transmission fluid leakage is found in the transmission fluid cooler, install a new transmission fluid cooler.

When there is evidence of transmission assembly or transmission fluid contamination due to the following transmission failure modes, install a new transmission fluid cooler.

- Major metallic failure
- Multiple clutches or clutch plate failure
- Sufficient component wear which result in metallic contamination