Transmission Fluid Cooler Flow Test

Transmission Fluid Cooler Flow Test

NOTE: The transmission linkage/cable adjustment, fluid level and line pressure must be within specification before carrying out this test.

1. Remove fluid level indicator from fluid filler tube.
2. Place funnel in fluid tiller tube.
3. Raise the vehicle on a hoist.
4. Remove the cooler retune line (rear fitting) front the fitting on the transmission case. Connect one end of a hose to the cooler return line and route other end of the hose up to a point where it can be inserted into the funnel at the fluid filler tube.
6. Remove the safety stands and lower the vehicle. Insert the end of the hose in the funnel.
7. Start the engine and run it at idle with transmission in the NEUTRAL position.
8. Once a steady flow of fluid (without air bubbles) is observed, remove the hose from the funnel and place the hose in a measuring container for IS. After 15 seconds place the hose back into the funnel and turn the engine off. Measure the amount of fluid in the container. If adequate flow was observed, approximately 322 ml (11 oz) will be in the measuring container; the test is now complete.
9. If the flow is not liberal, stop the engine. Disconnect the hose from the cooler return line and connect it to the converter outline fitting (front fitting) on the transmission case.
10. Repeat Steps 7 and 8. If flow is now approximately 322 ml (11 oz) in 15 seconds, refer to Transmission Fluid Cooler- Backflushing and Cleaning. Refer to fluid cooler diagnosis. If the flow is still not approximately 322 ml (11 oz) in 15 seconds, service the pump, main control and/or converter.