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Transaxle Fluid Cooler Flow Test

NOTE:
  • The transaxle linkage adjustment, fluid level and line pressure must be within specification before carrying out this test. See SELECTOR LEVER CABLE ADJUSTMENT for transaxle linkage adjustment procedure. For transaxle fluid level checking procedures, see VISUAL INSPECTION . For transaxle line pressure testing, see ROAD TESTING VEHICLE .
  1. Check the transaxle fluid level and fill as necessary.
  2. Remove the transaxle fluid level indicator from fluid filler tube and install a funnel in the fluid filler tube.
  3. With the vehicle in NEUTRAL, position it on a hoist. See LIFTING . Inspect the transaxle fluid cooler lines for damage. Install new transaxle fluid cooler lines as needed.
  4. Disconnect the cooler return line (rear line) by separating the tubing from the cooler line rubber hose.
  5. Plug the cooler line to avoid transaxle fluid loss.
  6. Connect one end of a hose to the cooler return line hose and route the other end of the hose up to a point where it can be inserted into the funnel at the fluid filler tube.
  7. Start the engine and run at idle with transaxle in NEUTRAL range until the automatic transaxle fluid is warm. Temperature is important to the flow rate measurement. Carry out the Fluid Cooler Flow Test.
    • Option 1: Once fluid flow no longer has air bubbles in it, remove the rubber hose from the funnel and insert it into a liter container. After 15 seconds, install the hose into the funnel and measure the amount of automatic transaxle fluid in the container. The rate of flow should be approximately 0.83-1.0 liter (28-34 oz.) in 15 seconds.
    • Option 2: Once fluid flow no longer has air bubbles in it, remove the rubber hose from the funnel and insert it into a liter container. As soon as 1 liter (1.06 quart) is dispensed into the container, install the hose into the funnel. One liter of automatic transaxle fluid should flow through the cooling system in approximately 15-17 seconds.
  8. Once adequate flow is determined, shut off the engine, remove the extension hose and reassemble the cooler line with the constant tension clamp.
  9. If flow is not adequate, stop the engine. Disconnect the hose from the cooler return line and connect it to the converter-out line. If flow is now liberal, carry out backflushing and cleaning procedure. See TRANSAXLE FLUID COOLER - BACKFLUSHING AND CLEANING. See TRANSAXLE FLUID COOLER  for transaxle fluid cooler diagnosis. If flow is still not liberal, repair the pump or converter.
  10. Check the transaxle fluid level and adjust as required.
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