6F35

Transmission Fluid Cooler





Transaxle Cooling - 6F35









When internal wear or damage has occurred in the transaxle, metal particles or clutch plate material may have been carried into the torque converter and transaxle fluid cooler. These contaminants are a major cause of recurring transaxle issues and must be removed from the system before the transaxle is put back into use. Refer to Transmission Fluid Cooler Backflushing and Cleaning Transmission Fluid Cooler Backflushing and Cleaning.

Transmission Fluid Cooler Flow Test

NOTE: The selector lever linkage, selector lever cable adjustment, transmission fluid level and line pressure must be within specification before carrying out this test. Refer to Automatic Transaxle/Transmission External Controls - Aisin AW21/6F35 Adjustments for selector lever linkage and selector lever cable adjustment and refer to Special Testing Procedures Special Testing Procedures for line pressure test. The transmission fluid must be above 85°C (185°F) for the cooler by-pass to open to carry out this test.

1. Using a scan tool, run the engine to establish the correct transmission fluid temperature of 85°C (185°F).

2. Remove the transmission fluid level indicator from the transmission fluid filler tube.

3. Place funnel in the transmission fluid filler tube.

4. With the vehicle in NEUTRAL, position it on a hoist. Refer to Jacking and Lifting Service and Repair.

5. Remove the transmission fluid cooler return tube (rear fitting) from the fitting on the transaxle case.

6. Connect one end of a hose to the cooler return tube and route other end of the hose up to a point where it can be inserted into the funnel at the transmission fluid filler tube.

7. Start the engine and run it at idle with the transmission in NEUTRAL.

8. When transmission fluid flowing from hose is in a steady stream, a liberal amount of transmission fluid should be observed. "Liberal" is described as about 1L (1 qt) delivered in 30 seconds. If a liberal flow is observed, the test is complete.

9. If the flow is not liberal, stop the engine. Disconnect the hose from the cooler return tube and connect it to the converter outlet tube fitting (front fitting) on the transaxle case.

10. Repeat Steps 7 and 8. If flow is now approximately 1L (1 qt) in 30 seconds, refer to Transmission Fluid Cooler Backflushing and Cleaning Transmission Fluid Cooler Backflushing and Cleaning. If the flow is still not approximately 1L (1 qt) in 30 seconds, repair the pump and/or the torque converter.

If new transmission fluid cooler tubes need to be installed, refer to Transaxle/Transmission Cooling - Aisin AW21/6F35 Removal and Replacement.