Initial Inspection and Diagnostic Overview

Transmission Cooling


Inspection and Verification

NOTICE: Whenever a transmission has been disassembled to install new parts, the transmission fluid cooler and/or auxiliary cooler should be replaced and the transmission fluid cooler tubes must be cleaned and backflushed to keep contaminants from entering the transmission, causing internal damage.

NOTE: Cleaning and backflushing the transmission fluid cooler tubes, along with following all the normal cleaning and inspection procedures during disassembly and reassembly, will keep contaminants from entering the transmission, 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 failure and must be removed from the transmission cooler system before the transmission is put back into use. Install a new transmission fluid cooler and/or auxiliary cooler and backflush the transmission fluid cooler tubes.

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

If the fault is not visually evident, GO to Symptom Chart - Transmission Cooling or GO to Symptom Chart - NVH. Symptom Chart - Transmission Cooling Symptom Chart - NVH