Transmission Fluid Cooler - Backflushing and Cleaning

Transmission Fluid Cooler Backflushing and Cleaning

Material:

Cooler Line and Remote Filter Fluid Flow (Part 1):

Cooler Line and Remote Filter Fluid Flow (Part 2):

Remote Fluid Filter:

CAUTION: Whenever the transmission has been serviced or a remanufactured transmission has been installed, the transmission fluid cooler, cooler tubes and the remote filter manifold must be cleaned and backflushed to remove any foreign material or transmission failure will occur.

NOTE: This transmission is equipped with a remote transmission fluid filter. When carrying out an overhaul or installing a remanufactured transmission, a new filter element must be installed.

1. Using a suitable torque converter/fluid cooler cleaner, flush the transmission fluid cooler and tubes.





2. If equipped, remove and discard the transmission fluid in-line filter.
3. Remove the remote filter element.

4. CAUTION: The transmission cooler tubes must be disconnected prior to flushing out the cooler tubes.

Disconnect the 4 transmission fluid cooler tubes at the remote filter housing.
5. Leave the transmission fluid cooler tubes disconnected from the transmission case.
6. Disconnect both transmission fluid cooler tubes from the OTA.
7. Flush each transmission fluid cooler tube independently.
8. Connect the cleaner pressure and return tubes correctly.
1 Connect the pressure tube-to-fluid cooler inlet tube.
2 Connect the return tube-to-fluid cooler outlet tube.
3 Place the outlet end of the return tube in the fluid tank reservoir.

9. NOTE: Cycling the solvent pump on and off will help dislodge contaminants in the cooler system.

Switch the pumps on. Allow the fluid to circulate a minimum of 5 minutes.
10. Switch the pump off.
11. Disconnect the cleaner pressure tube at the fluid cooler tube.
12. Using compressed air, blow through the fluid cooler inlet tube until all fluid is removed.
13. Remove the rubber hoses from fluid cooler tubes.
14. Connect the cleaner pressure and return tubes correctly.
1 Connect the pressure tube to the radiator in-tank fluid cooler.
2 Connect the return tube to the other side of the radiator in-tank fluid cooler.
3 Place the outlet end of the return tube in the fluid tank reservoir.

15. NOTE: Cycling the pump on and off will help dislodge contaminants in the cooler system.

Switch the pumps on. Allow the fluid to circulate a minimum of 5 minutes.
16. Switch the pump off.
17. Disconnect the cleaner pressure tube at the fluid cooler tube.
18. Using compressed air, blow through the fluid cooler inlet tube until all fluid is removed.
19. Remove the rubber hoses from fluid cooler tubes.
20. Flush the remote filter manifold and make sure that the small bypass orifice is free of foreign material.
21. Flush the remote filter housing and clean the magnet.
22. Backflush and forward flush the OTA cooler.
23. Backflush and then forward flush the radiator in-tank cooler.
24. Install a new remote filter element.
25. Install a new OTA as part of a transmission service or installing a remanufactured transmission.
26. Carry out the transmission fluid cooler flow test.