Torqshift - Automatic Transaxle/Transmission
Transmission Fluid CoolerBackflushing and Cleaning
Transmission Cooling Fluid Flow
Transmission Cooling Fluid Flow (Part 1):
Transmission Cooling Fluid Flow (Part 2):
Procedure for using a tank heated transmission fluid cooler line flusher
CAUTION: Whenever the transmission has been serviced or a remanufactured transmission has been installed, the transmission fluid cooler tubes must be cleaned and backflushed to remove any contaminants or transmission failure will occur.
NOTE: Install a new oil-to-air (OTA) cooler as part of a transmission overhaul, or when installing a remanufactured transmission.
NOTE: Repeat repairs will occur if the transmission fluid flow does not meet specification. To avoid repeat repairs, carry out the fluid cooler flow test.
NOTE: Plug the flusher into a 110-volt outlet and allow it to heat up to the correct temperature.
NOTE: Carry out this procedure with the OTA cooler and the transmission removed from the vehicle.
1. If equipped, remove the transmission fluid in-line filter. Install a straight pipe with hose clamps in its place.
2. NOTE: The transmission cooler return line can be identified as the line that runs from the OTA outlet (driver side) to the rear of the transmission.
Flush the transmission cooler return tube as follows:
1) Using the appropriate fittings and quick disconnects supplied with the flusher, connect the flusher pressure and return lines to either end of the transmission cooler return tube.
2) Switch the flusher pump on and allow it to run for 60 seconds.
3) Turn the switch off after 60 seconds and disconnect the pressure line.
4) Blow air through the cooler tube until the fluid is drained pack into the flusher.
5) Disconnect the flusher return line.
3. Flush the transmission cooler pressure tube and radiator in-tank cooler as follows:
1) The pressure tube and radiator in-tank cooler must be back flushed, then forward flushed. This is necessary to thoroughly flush the in-tank cooler
2) The transmission cooler pressure tube can be identified as the tube that runs from the OTA cooler inlet to the front of the transmission.
3) Using the appropriate fittings and quick disconnects supplied with the flusher, connect the flusher pressure line to the radiator in-tank cooler outlet. Connect the flusher return line to the transmission cooler pressure tube (the cooler tube near the transmission bellhousing).
4) Switch the flusher on and allow it to run for 15 minutes.
5) Turn the switch off after 15 minutes then reverse the flusher lines.
6) Switch the flusher pump on and allow it to run for 15 minutes.
7) Disconnect the flusher pressure line and blow air through the line until the fluid is drained back into the flusher.
8) Disconnect the flusher return line.
4. Install a new transmission fluid in-line filter if equipped. Install the transmission fluid in-line filter kit if the vehicle was not equipped with the kit.
Procedure for using a flush and fill machine
CAUTION: Whenever the transmission has been serviced or a remanufactured transmission has been installed, the transmission fluid cooler tubes must be cleaned and backflushed to remove any contaminants or transmission failure will occur.
NOTE: Install a new OTA cooler as part of a transmission overhaul, or when installing a remanufactured transmission.
NOTE: Repeat repairs will occur if the transmission fluid flow does not meet specification. To avoid repeat repairs, carry out the fluid cooler flow test.
NOTE: Carry out this procedure with the OTA cooler and the transmission removed from the vehicle.
1. Using a suitable torque converter/fluid cooler cleaner, flush the transmission fluid cooler and tubes.
2. If equipped, remove the transmission fluid in-line filter. Install a straight pipe with hose clamps in its place.
3. Leave the transmission fluid cooler tubes disconnected from the transmission case.
4. Disconnect both transmission fluid cooler tubes from the radiator in-tank cooler.
5. Flush each transmission fluid cooler tube independently.
6. Connect the cleaner pressure and return lines correctly, in the following sequence.
1) Connect the pressure line to the transmission fluid cooler inlet tube.
2) Connect the return line to the transmission fluid cooler outlet tube.
3) Place the outlet end of the return line in the fluid tank reservoir.
7. NOTE: Cycling the solvent pump on and off will help dislodge contaminants in the cooler system.
Switch the pump ON. Allow the transmission fluid to circulate a minimum of 5 minutes.
8. Switch the pump OFF.
9. Disconnect the cleaner pressure line at the transmission fluid cooler tube.
10. Using compressed air, blow through the transmission fluid cooler inlet tube until all transmission fluid is removed.
11. Remove the rubber hoses from transmission fluid cooler tubes.
12. Connect the cleaner pressure and return lines correctly, in the following sequence.
1) Connect the pressure line to the radiator in-tank transmission fluid cooler.
2) Connect the return line to the other side of the radiator in-tank transmission fluid cooler.
3) Place the outlet end of the return line in the fluid tank reservoir.
13. NOTE: Cycling the pump on and off will help dislodge contaminants in the cooler system.
Switch the pump ON. Allow the transmission fluid to circulate a minimum of 5 minutes.
14. Switch the pump OFF.
15. Disconnect the cleaner pressure line at the transmission fluid cooler tube.
16. Using compressed air, blow through the transmission fluid cooler inlet tube until all transmission fluid is removed.
17. Remove the rubber hoses from transmission fluid cooler tubes.
18. NOTE: Install a new OTA cooler as part of a transmission overhaul or when installing a remanufactured transmission.
Backflush and forward flush the OTA.
19. Backflush and forward flush the radiator in-tank transmission fluid cooler.
20. Install a new transmission fluid in-line filter if equipped. Install the transmission fluid in-line filter kit if the vehicle was not equipped with the kit.
21. Carry out the transmission fluid cooler flow test.