Transmission Fluid Cooler - Backflushing and Cleaning

For information on Ford Color Coded Illustrations refer to OEM COLOR CODING

Special Tool(s) / General Equipment 

Flushing 

1. NOTE: 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.

   The transmission cooling system (cooler assembly) MUST be flushed every time the transmission is overhauled or replaced in order to minimize the likelihood of repeat repairs. It is mandatory that proper equipment and procedures be followed when flushing the cooler assembly. The flushing equipment used MUST:

   • maintain fluid at 140deg.F or above,
   • pulsate fluid during cleaning,
   • have a GPM flow meter,
   • have twin magnetic filters,
   • and have air purge capability before and after flushing.

2. If equipment meeting the specifications above is not available, the transmission fluid cooler assembly should be replaced.
3. Check and top off fluid level of the transmission cooling system heated flusher with transmission fluid.
   • Refer to appropriate Automatic Transmission Service Information. Use the General Equipment: Transmission Cooling System Heated Flusher

4. Turn on the heater and allow the fluid in the cooler line flusher 15-30 minutes to heat up to 60deg.C (140deg.F) before using.
5. Remove the transmission fluid cooler assembly. Refer to: Transmission Fluid Cooler .
6. Install the line adapters on the transmission fluid cooler assembly inlet and outlet tubes.
7. Attach the cooler line flusher red line to the transmission fluid cooler assembly inlet tube. For the location of the transmission fluid cooler inlet and outlet tubes. Refer to: Transmission Cooling - Overview .
8. Attach the cooler line flusher blue line to the transmission fluid cooler assembly outlet tube.
9. Follow the equipment instructions to purge the transmission fluid cooler assembly prior to starting the flushing procedure.
10. Allow the transmission fluid 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.
11. If the transmission fluid cooling system heated flusher is equipped with an inspection micron filter:
    1. Remove and clean the Oberg 28 micron filter.
    2. Install the filter.
    3. Backflush the system for 5 minutes.
    4. Remove and inspect the filter.
    5. If debris/contamination is present on the filter, repeat steps 9 through 11.

12. Follow the equipment instructions to purge the transmission fluid cooler assembly.
13. Install the transmission fluid cooler assembly. Refer to: Transmission Fluid Cooler .