Transmission Fluid Cooler Backflushing and Cleaning

Transmission Fluid Cooler Backflushing and Cleaning









NOTICE: Use transmission fluid specified for this transmission. Do not use any supplemental transmission fluid additives or cleaning agents. The use of these products could cause internal transmission components to fail, which will affect the operation of the transmission.

NOTE: Transmission fluid cooler backflushing and cleaning will be performed using the Transmission Heated Cooler Line Flusher or equivalent. Follow the manufacturer's instructions included with the machine. Test the equipment to make sure that a vigorous fluid flow is present before proceeding.

NOTE: If the Transmission Heated Cooler Line Flusher or equivalent is not available, install a new transmission fluid cooler and/or an auxiliary transmission fluid cooler.

NOTE: If the vehicle is equipped with an in-line transmission fluid filter, remove and discard the in-line filter.

1. Check and top off fluid level of the cooler line flusher with transmission fluid.

2. Allow the transmission fluid in the cooler line flusher 15-30 minutes to heat up to 60°C (140°F) before using.

3. If equipped, remove and discard the in-line transmission fluid filter.





4. Install the line adapters into the transmission cooler tubes.

5. Attach the cooler line flusher red line to the transmission fluid cooler pressure tube quick disconnect fitting.

6. Attach the cooler line flusher blue line to the transmission fluid cooler return tube quick disconnect fitting.

7. Follow the equipment instructions to purge the transmission fluid cooler tubes and transmission fluid cooler prior to starting the flushing procedure.

8. Allow the cooling system to backflush for 10-15 minutes, then flush the transmission fluid cooler in a normal flow direction for an additional 10-15 minutes.