Transmission Fluid Cooler Flow Test

WARNING: This page is about a different car, the 2002 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The transmission linkage/cable adjustment, fluid level and line pressure must be within specification before carrying out this test. Refer to CABLE ADJUSTMENT for shift linkage adjustment. for adjustments.

Remove fluid level indicator from fluid filler tube.
Place funnel in fluid filler tube.
Raise the vehicle on a hoist and place suitable safety stands under the vehicle.

Fig 1: Identifying Fluid Filler
Courtesy of FORD MOTOR CO.
Before carrying out the Transmission Fluid Cooler Flow Test, examine the cooler lines for installation of an in-line fluid filter. If equipped with an in-line fluid filter, remove and discard the in-line fluid filter prior to carrying out the TRANSMISSION FLUID COOLER FLOW TEST and flushing the system.
Remove the cooler return line (top fitting) from 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.
Remove the safety stands and lower the vehicle. Insert end of hose into the funnel.
Start the engine and run it at idle with the transmission in NEUTRAL.
When fluid flows from the hose in a steady stream, a liberal amount of fluid should be observed. "Liberal" is about 1 liter (1 quart) delivered in 15 seconds. If a liberal flow is observed, the test is complete.
If the flow is not liberal, stop the engine. Disconnect the hose from the cooler return line and connect it to the converter outlet fitting (bottom fitting) on the transmission case.
Repeat Step 7 and Step 8. If flow is now approximately 1 liter (1 quart) in 15 seconds, refer to TRANSMISSION FLUID COOLER - BACKFLUSHING AND CLEANING . If the flow is still not approximately 1 liter (1 quart) in 15 seconds, repair or install pump and or converter.

Fig 2: Identifying Transmission Fluid Filler
Courtesy of FORD MOTOR CO.

NOTE: If the vehicle was not equipped with an inline fluid filter, install a fluid filter service kit (XC3Z-7B155-AA) follow the instructions supplied in the kit. If the vehicle was equipped with a inline fluid filter, Install a new fluid filter (XC3Z-7B155-BA).

Install a new inline transmission fluid filter or filter kit and check for leaks.

For transmission fluid cooler or tube replacement, refer to REMOVAL AND INSTALLATION .