Transmission Fluid Cooler Flow Test
Transmission Fluid Cooler Flow TestNOTE: The transaxle linkage adjustment, fluid level and line pressure must be within specification before performing this test.
1. Remove fluid level indicator from fluid filler tube.
2. Place funnel in fluid filler tube.
3. Raise vehicle on hoist and position suitable safety stands under vehicle.
4. Remove cooler return line (rear fitting) from fitting on transaxle case.
5. Connect one end of a hose to the cooler return line and route the other end of the hose up to a point where it can be inserted into the tunnel at the fluid filler tube.
6. Remove safety stands and lower vehicle. Insert end of hose into tunnel.
7. Start engine and run at idle with transaxle in NEUTRAL range.
8. When fluid flowing from hose is all liquid. an adequate amount of fluid should he observed. Approximately 1.0 liter (1.0 Quart) of liquid delivered in l5 seconds. If adequate flow is observed, test is completed.
9. If flow is not adequate, stop engine. Disconnect hose from cooler return line and connect it to converter-out line (front fitting) on case.
10. Repeat Steps 7 and 8. If flow is now liberal, carry out back flushing and cleaning procedures in Cleaning and Inspection; refer to diagnosis of transaxle fluid cooler. If flow is still not liberal, repair the pump or converter.
Transmission Fluid Cooler Tubes
Transaxle Cooler Backflushing/Cleaning
1. Conduct backflushing with Torque Converter Cleaner 014-00028 or equivalent. Test the equipment to make sure that a vigorous fluid flow is present before proceeding. Replace the system filter if flow is weak or contaminated.
2. To aid in connecting the cleaner to the transaxle steel cooler lines, connect two additional rubber hoses to the transaxle end of the steel transaxle cooler lines:
^ Connect the cleaner tank pressure line to the steel transaxle cooler return line (longest line).
^ Connect a tank return hose to the steel transaxle cooler pressure line (shorter line). Place the outlet end of this hose in the solvent tank reservoir.
3. Turn on the solvent pump and allow the solvent to circulate a minimum of five minutes (cycling the switch on and off will help dislodge contaminants in the cooler system).
4. Switch off the solvent pump and disconnect the solvent pressure hose from the transaxle cooler return line.
5. Use compressed air to blow out the cooler(s) and lines (blow air into the transaxle cooler return line) until all solvent is removed.
6. Remove the rubber return hose from the remaining steel cooling line.
Transaxle Fluid Cooler Tube Replacement
When fluid leakage is found at the transmission fluid cooler, the transmission fluid cooler must be replaced.
When one or more of the fluid cooler tubes must be replaced, each replacement fluid cooler tube must be fabricated from the same size steel tubing as the original fluid cooler tube.
Using the old fluid cooler tube as a guide, bend the new liquid cooler tube as required. Add the necessary fittings and install the fluid cooler tube.
After the fittings have been tightened, add fluid as needed and check for fluid leaks