Focus L4-2.0L (2009)
Fluid - A/T: Service and Repair
Transmission Fluid Cooler Backflushing and Cleaning
4F27E
Transmission Fluid Cooler Backflushing and Cleaning
NOTICE: The use of any transmission fluid other than what is recommended for this transaxle will cause transaxle damage. Refer to the fluid
specification for the correct fluid.
NOTICE: Do not use water-based cleaners, mineral spirits, brake cleaner or solvents that may contain acetone, xylene or heptane to clean
and/or flush the transaxle assembly, transaxle components or the torque converter, transaxle damage will occur. Use only clean transmission
fluid designated for the transmission/converter being serviced.
1. Carry out backflushing with a suitable torque converter/transmission fluid cooler cleaner. Test equipment to make sure that a vigorous
transmission fluid flow is present before proceeding. Install a new system filter if flow is weak or contaminated.
2. Remove the transmission fluid cooler tubes.
3. To aid in attaching the cleaner to the transmission fluid cooler, install rubber hoses on the metal inlet and outlet tubes on the transmission fluid
cooler. Install the cleaner on the rubber hoses as follows:
1. Connect the cleaner tank pressure tube to the transmission fluid cooler return tube.
2. Connect a tank return hose to the transmission fluid cooler pressure tube. Place the outlet end of this hose in the transmission fluid tank
reservoir.
4. Turn on the transmission fluid pump and allow the transmission fluid to circulate a minimum of 5 minutes (cycling switch on and off will help
dislodge contaminants in cooling system).
5. Switch off the cleaner and disconnect the pressure hose from the transmission fluid cooler return tube.
6. Clean the transmission fluid cooler tubes by hand.
7. Use compressed air to blow out the cooler(s) and tubes (blow air into the transmission fluid cooler return tube) until all fluid is removed.
8. Remove the rubber hoses from the transmission fluid cooler and install the transmission fluid cooler tubes.
9. Check the transmission fluid level.
