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Home >> Ford >> 2002 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 3519 (Automatic Transmission - 5R110W - F250-F550 Super Duty - Special Testing Procedures, Diagnosis By Symptom, General Procedures) >> General Procedures >> Transmission Fluid Cooler BACKFLUSHING And Cleaning >> Procedure for using a flush and fill machine

Procedure for using a flush and fill machine

WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Whenever the transmission has been overhauled or a remanufactured transmission has been installed, the transmission fluid cooler tubes and the radiator in-tank fluid cooler must be cleaned and backflushed to remove any contaminants or repeat transmission failure will occur.
NOTE: Install a new OTA transmission fluid cooler as part of a transmission overhaul, or when installing a remanufactured transmission.
NOTE: Early build transmissions are equipped with a remote transmission fluid filter located under the transmission bell housing. When carrying out an overhaul or installing a remanufactured transmission, a new remote filter assembly must be installed.
NOTE: Repeat repairs will occur if the transmission fluid flow does not meet specification. To avoid repeat repairs, carry out the fluid cooler flow test. For additional information, refer to Transmission Fluid Cooler .
  1. Using a suitable torque converter/fluid cooler cleaner, flush the transmission fluid cooler and tubes.
  2. If equipped, remove and discard the inline transmission fluid filter.
    3. Fig 1: Identifying Transmission Fluid In-Line Filter
    G03908234Courtesy of FORD MOTOR CO.
  3. Remove and discard the remote transmission fluid filter assembly (early build vehicles).
    4. NOTE: The transmission cooler tubes must be disconnected prior to flushing out the cooler tubes.
  4. Disconnect the 4 transmission fluid cooler tubes at the remote transmission fluid filter. For additional information, refer to TRANSAXLE/TRANSMISSION COOLING article.
  5. Leave the transmission fluid cooler tubes disconnected from the transmission case.
  6. Disconnect both transmission fluid cooler tubes from the radiator in-tank transmission fluid cooler.
  7. Flush each transmission fluid cooler tube independently.
  8. Connect the cleaner pressure and return lines correctly, in the following sequence.
    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 pump 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 transmission fluid cooler inlet tube until all transmission fluid is removed.
  13. Remove the rubber hoses from fluid cooler tubes.
  14. Connect the cleaner pressure and return lines correctly, in the following sequence.
    1. Connect the pressure line to the radiator in-tank transmission fluid cooler.
    2. Connect the return line to the other side of the radiator in-tank transmission 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 pump ON. Allow the fluid to circulate a minimum of 5 minutes.
  16. Switch the pump OFF.
  17. Disconnect the cleaner pressure line at the transmission fluid cooler tube.
  18. Using compressed air, blow through the transmission fluid cooler inlet tube until all transmission fluid is removed.
  19. Remove the rubber hoses from fluid cooler tubes.
  20. Install a new remote filter assembly using a backup wrench to avoid damage to the remote filter fluid cooler tube nut fittings.
    • Tighten to 40 Nm (30 lb-ft).
    21. NOTE: Install a new oil-to-air (OTA) cooler as part of a transmission overhaul or when installing a remanufactured transmission.
  21. Back flush and forward flush the OTA.
  22. Back flush and forward flush the radiator in-tank cooler.
  23. Carry out the transmission fluid cooler flow test. For additional information, refer to Transmission Fluid Cooler .
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