Transmission Cooler: Description and Operation

Transmission Cooling
This vehicle with an automatic transmission is equipped with an auxiliary transmission fluid cooler. The cooler transfers heat from the transmission fluid to the ambient air.

For transmission fluid cooler flow test, refer to Transmission Fluid Cooler Flow Test.

For transmission fluid cooler backflushing and cleaning, refer to Transmission Fluid Cooler Backflushing and Cleaning.

Transmission Fluid Cooler Tubes (4.6L Engine):

Transmission Fluid Cooler Tubes (4.0L Engine):

Transmission Cooling

CAUTION: Whenever a transmission has been disassembled to installed 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, 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 troubles and must be removed from the system before the transmission is put back in use.