Transmission Fluid Cooler Tubes - Backflushing and Cleaning

Transmission Fluid Cooler Tubes-Backflushing and Cleaning
1. Using a suitable torque converter/fluid cooler cleaner, clean the fluid cooler tubes.
2. Test your equipment to make sure that a vigorous fluid flow is present before proceeding. Replace the filter in the flush equipment if the flow is weak or contaminated.





3. If the vehicle is equipped with an inline transmission fluid filter, remove and discard the filter.
4. To aid in attaching the cleaner to the transmission steel cooler tubes, connect two additional rubber hoses to the transmission end of the steel transmission cooler tubes as follows:
- Disconnect the fluid cooler tubes from the oil-to-air (OTA) cooler.
- Install a rubber hose in place of the oil-to-air cooler.
- Connect the cleaner tank pressure line to the steel transmission cooler return tube (the longest tube).
- Connect a tank return hose to the steel transmission cooler pressure tube (shorter tube). Place the outlet end of this hose in the solvent tank reservoir.
5. Turn on solvent pump and allow the solvent to circulate a minimum of 5 minutes (cycling switch on and off will help dislodge contaminants in the cooler system).
6. Switch off the solvent pump and disconnect the solvent pressure hose from the transmission cooler return tube.
7. Use compressed air to blow out the cooler(s) and tubes (blow air into the transmission cooler return tube) until all solvent is removed.
8. Remove the rubber return hose from the remaining steel cooler tube.
9. Install the oil-to-air (OTA) cooler tubes.

10. NOTE: If the vehicle was not equipped with an inline fluid filter, install a fluid filter service kit (XC3Z-7B155-AA). Follow the instructions supplied in the kit. If the vehicle was equipped with a inline fluid filter, install a new fluid filter (XC3Z-7B155-BA).





Once a adequate flow has been established, install a new inline fluid filter on service kit assembly.
11. Once the fluid filter has been installed, check that fluid will flow out of the filter.