Transmission Fluid Cooler - Backflushing and Cleaning
Transmission Fluid Cooler - Backflushing and CleaningSpecial Tool(s):
Material:
Cooler Line and Remote Filter Fluid Flow
Cooler Line and Remote Filter Fluid Flow (Part 1):
Cooler Line and Remote Filter Fluid Flow (Part 2):
Remote Fluid Filter
Remote Fluid Filter (Part 2):
Remote Fluid Filter (Part 3):
1. Transmission Fluid Flow Chart.
Transmission Fluid Flow Chart:
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 and the remote filter manifold 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: This transmission is equipped with a remote transmission fluid filter which is located on the driver side rear of the transmission. When carrying out an overhaul or installing a remanufactured transmission a new filter element must be installed.
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 oil-to-air (OTA) cooler and the transmission removed from the vehicle.
NOTE: Leave the remote filter lines connected.
1. If equipped, remove the in-line transmission fluid filter. Install a straight pipe with hose clamps in its place.
2. Remove the remote filter and magnet.
3. Clean and reinstall the remote filter housing.
4. Flush the transmission cooler return line first.
1 The transmission cooler return line can be identified as the line that runs from the OTA outlet (drivers side) to the rear of the transmission.
2 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 line.
3 Switch the flusher pump on and allow it to run for 60 seconds.
4 Turn the switch off after 60 seconds and disconnect the pressure line.
5 Blow air through the cooler line until the fluid is drained pack into the flusher.
6 Disconnect the flusher return line.
5. Flush the transmission cooler pressure line and radiator in-tank cooler as follows:
1 The pressure line 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 line can be identified as the line 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 line (the cooler line 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.
6. Remove the remote filter housing and make sure the bypass orifice is free of foreign material.
7. Clean the filter magnet and reinstall it along with a new filter.
8. Install the remote filter housing.
^ Tighten to 50 Nm (37 ft. lbs.).
9. Install a new in-line filter if equipped. Install the 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 and the remote filter manifold 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: This transmission is equipped with a remote transmission fluid filter which is located on the driver side rear of the transmission. When carrying out an overhaul or installing a remanufactured transmission a new filter element must be installed.
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. For additional information, refer to Transmission Fluid Cooler.
NOTE: Carry out this procedure with the oil-to-air (OTA) cooler and the transmission removed from the vehicle.
NOTE: Leave the remote filter lines connected.
1. Using a suitable torque converter/fluid cooler cleaner, flush the transmission fluid cooler and tubes.
2. If equipped, remove and discard the transmission fluid in-line filter.
3. Remove the remote filter element.
4. CAUTION: The transmission cooler tubes must be disconnected prior to flushing out the cooler tubes.
Disconnect the 4 transmission fluid cooler tubes at the remote filter housing.
5. Leave the transmission fluid cooler tubes disconnected from the transmission case.
6. Disconnect both transmission fluid cooler tubes from the radiator in-tank cooler.
7. Flush each transmission fluid cooler tube independently.
8. Connect the cleaner pressure and return lines correctly.
1 Connect the pressure line-to-fluid cooler inlet tube.
2 Connect the return line-to-fluid cooler outlet tube.
3 Place the outlet end of the return line in the fluid tank reservoir.
9. NOTE: Cycling the solvent pump on and off will help dislodge contaminants in the cooler system.
Switch the pump ON. Allow the fluid to circulate a minimum of 5 minutes.
10. Switch the pump OFF.
11. Disconnect the cleaner pressure line at the fluid cooler tube.
12. Using compressed air, blow through the fluid cooler inlet tube until all fluid is removed.
13. Remove the rubber hoses from fluid cooler tubes.
14. Connect the cleaner pressure and return lines correctly.
1 Connect the pressure line to the radiator in-tank fluid cooler.
2 Connect the return line to the other side of the radiator in-tank fluid cooler.
3 Place the outlet end of the return line in the fluid tank reservoir.
15. NOTE: Cycling the pump on and off will help dislodge contaminants in the cooler system.
Switch the pump ON. Allow the fluid to circulate a minimum of 5 minutes.
16. Switch the pump OFF.
17. Disconnect the cleaner pressure line at the fluid cooler tube.
18. Using compressed air, blow through the fluid cooler inlet tube until all fluid is removed.
19. Remove the rubber hoses from fluid cooler tubes.
20. Flush the remote filter manifold and make sure that the small bypass orifice is free of foreign material.
21. Flush the remote filter housing and clean the magnet.
22. NOTE: Install a new oil-to-air (OTA) cooler as part of a transmission overhaul, or when installing a remanufactured transmission.
Backflush and forward flush the OTA.
23. Backflush and forward flush the radiator in-tank cooler.
24. Install a new remote filter element.
25. Carry out the transmission fluid cooler flow test.