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Transmission Fluid Cooler - BACKFLUSHING And Cleaning

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
MATERIAL

Item Specification
Motorcraft MERCON® Multi-Purpose (ATF) Transmission Fluid XT-6-QSP MERCON®SP
Fig 1: Cooler Line And Remote Filter Fluid Flow Diagram
G03922612Courtesy of FORD MOTOR CO.
Fig 2: Identifying Remote Fluid Filter
G03922613Courtesy of FORD MOTOR CO.
CAUTION: Whenever the transmission has been serviced or a remanufactured transmission has been installed, the transmission fluid cooler, cooler lines and the remote filter manifold must be cleaned and backflushed to remove any contaminants 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 lines.
  2. If equipped, remove and discard the transmission fluid in-line filter.
    Fig 3: Identifying Fluid In-Line Filter
    G03908234Courtesy of FORD MOTOR CO.
  3. Remove the remote filter element.
    4. CAUTION: The transmission cooler lines must be disconnected prior to flushing out the cooler lines.
  4. Disconnect the four transmission fluid cooler lines at the remote filter housing. For additional information, refer to TRANSAXLE/TRANSMISSION COOLING .
  5. Leave the transmission fluid cooler lines disconnected from the transmission case.
  6. Disconnect both transmission fluid cooler lines from the OTA.
  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 fluid tank reservoir.
    9. NOTE: Cycling the solvent pump on and off will help dislodge contaminants in the cooler system.
  9. Switch the pumps on. Allow the fluid to circulate a minimum of 5 minutes.
  10. Switch the 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 fluid 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 fluid tank reservoir.
    15. NOTE: Cycling the pump on and off will help dislodge contaminants in the cooler system.
  15. Switch the pumps on. Allow the fluid to circulate a minimum of five minutes.
  16. Switch the 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 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 then flush the radiator in-tank cooler.
  23. Install a new remote filter element.
  24. Flush the OTA as part of a transmission service or installing a remanufactured transmission.
  25. Carry out the transmission fluid cooler flow test. For additional information, refer to TRANSMISSION FLUID COOLER .
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