Transmission Fluid Cooler - Backflushing and Cleaning

Transmission Fluid Cooler- Backflushing and Cleaning











Cooler Line and Remote Filter Fluid Flow

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

CAUTION: A new Oil to Air (OTA) cooler must be installed to prevent foreign material from reentering back into the transmission. If foreign material reenters the transmission, 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 lines.
2. Remove the remote filter element.

3. CAUTION: The transmission cooler lines must be disconnected prior to flushing out the cooler lines. Do not attempt to flush out the remote filter housing or damage to the housing will occur.

Disconnect the four transmission fluid cooler lines at the remote filter housing.
4. Leave the transmission fluid cooler lines disconnected from the transmission case.
5. Disconnect both transmission fluid cooler lines from the OTA.
6. Discard the OTA if overhauling or installing a new transmission.
7. Flush each transmission fluid cooler line independently.
8. Connect the cleaner pressure and return lines correctly.
1 Connect the pressure line to fluid cooler inlet tube.
2 Connect the return line to fluid cooler outlet tube.
3 Place the outlet end of the return line in the solvent tank reservoir.

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

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

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

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