Transmission Fluid Cooler Backflushing and Cleaning

Transmission Fluid Cooler

Backflushing and Cleaning

Transmission Fluid Combo Cooler Without Cooler Bypass Valve:

Transmission Fluid Combo Cooler With Cooler Bypass Valve:

1. Remove the radiator grille.

2. CAUTION: Do not exceed 276 kPa (40 psi) of air pressure when flushing the cooler or damage to the internal cooler fins will occur.

CAUTION: Flush with clean transmission fluid only. Do not use solvents, mineral spirits or water-based cleaners.

NOTE: Rubber hoses must be attached to the ends of the fluid cooler tubes, to aid in connecting them to the cleaner.

Backflush any contaminants from the oil-to-air cooler by connecting the flushing machine pressure line to the transmission fluid cooler outlet tube and the return line to the transmission fluid cooler inlet tube.

After 5 minutes, stop the machine, reverse the hoses and repeat the flushing.

3. CAUTION: Do not exceed 276 kPa (40 psi) of air pressure when flushing the cooler. Damage to the cooler will occur.

NOTE: Some vehicles are equipped with a cold weather bypass valve which cannot by cleaned or flushed. A new valve should be installed as part of an overhaul or prior to the installation of a remanufactured transaxle.

Using compressed air, blow through the coolers until all fluid is removed.