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Transmission Fluid Cooler Tubes - Backflushing and Cleaning: Material

WARNING: This page is about a different car, the 2005 Mercury Montego and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
MATERIAL SPECIFICATION CHART

Item Specification
Motorcraft Premium Automatic Transmission Fluid XT-8-QAW (US); CXT-8-LAW12 (Canada) WSS-M2C924-A
CAUTION: Do not use water-based cleaners to clean or flush the cooler tubes or transmission damage will occur. Mineral spirits can be used to clean the cooler tubes, providing the cooler tubes are flushed with clean automatic transmission fluid and blown dry with shop air. Use only clean automatic transmission fluid designated for the transmission and torque converter being serviced.
CAUTION: MERCON®, MERCON®V, MERCON®SP, Motorcraft Premium Automatic Transmission Fluid and Motorcraft Continuously Variable Chain Type Transmission Fluid are not interchangeable transmission fluids. The use of any fluid other than what is recommended for this transmission will cause transmission damage. Refer to the fluid specification for the correct fluid.
  1. Disconnect the transmission fluid cooler tubes from the transmission fluid cooler.
  2. Disconnect the transmission fluid cooler tubes from the transaxle.
  3. Carry out 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 system filter if flow is weak or contaminated.
  4. To aid in attaching the cleaner to the transmission steel cooler tube, connect 3 additional rubber hoses to the transaxle ends of the steel transaxle cooler tube as follows:
    1. Connect the cleaner tank pressure tube to the steel transaxle cooler return tube.
    2. Connect a tank return hose to the steel transmission cooler pressure tube. Place the outlet end of this hose in the fluid tank reservoir.
    3. Connect a rubber hose to both ends of the transmission fluid cooler tubes (where the transmission fluid cooler tubes connect to the transmission fluid cooler).
  5. Turn on the fluid pump and allow the fluid to circulate a minimum of 5 minutes (cycling switch on and off will help dislodge contaminants in the cooler system).
  6. Switch off the fluid pump and disconnect the fluid pressure hose from the transaxle cooler return tube.
  7. Use compressed air to blow out the cooler(s) and tubes (blow air into the transaxle cooler return tube) until all fluid is removed.
  8. Remove the rubber return hose from the remaining steel cooler tube.
  9. Once the cooler tubes have been flushed out, install a new transmission fluid cooler. For additional information, refer to TRANSAXLE/TRANSMISSION COOLING .
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