F 150 2WD V8-4.6L VIN W (2007)
Fluid - A/T: Service and Repair
Transmission Fluid Cooler-Backflushing and Cleaning
Transmission Fluid Cooler-Backflushing and Cleaning
Material
1. CAUTION: Do not use any supplemental transmission fluid additives or cleaning agents. The use of these products could cause internal
transmission components to fail; this will effect the operation of the transmission.
Conduct backflushing with a suitable torque converter/fluid cooler cleaner. Test your equipment to make sure that a vigorous fluid flow is present
before proceeding. Install a new filter in the flush equipment if flow is weak or contaminated.
2. If equipped, remove and discard the transmission fluid in-line filter.
3. Remove the transmission fluid cooler bypass valve and install rubber hoses in its place.
4. To aid in attaching the cleaner to the transmission steel cooler lines, connect 2 additional rubber hoses to the transmission end of the steel
transmission cooler lines as described below.
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Connect the cleaner tank pressure line to the steel transmission cooler return line (longest line).
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Connect a tank return hose to the steel transmission cooler pressure line (shorter line). Place the outlet end of this hose in the tank reservoir.
5. Turn on the pump and allow the fluid to circulate a minimum of 5 minutes (cycling switch on and off will help dislodge contaminants in cooler
system).
6. Switch off the pump and disconnect the pressure hose from the transmission cooler return line.
7. Use compressed air to blow out the cooler(s) and lines (blow air into the transmission cooler return line) until all fluid is removed.
8. Remove the rubber return hose from the remaining steel cooler line.
9. Remove the rubber hoses and reinstall the transmission fluid cooler bypass valve.
