Automatic Transmission Cooler Flow Testing

An automatic transmission cooler flow test is a highly recommended segment of an automatic transmission service & an absolute requirement by BBE AUTO when our transmissions are fitted.

There are two major causes of an automatic transmission failure.

Lack of fluid flow (usually caused by a restricted cooler, which is normally a part of the radiator)
Heat caused by (excessive load or cooling system failure)

Checklist

Cooler Flow testing must be performed at the transmission return line AFTER the cooler/radiator
Test MUST be performed at the transmission end (to ensure that cooler lines are also clear)
Remove one end of cooler hose & place in a measuring container
Start engine & idle for approx 15 seconds
Switch off engine & record the amount of fluid removed
The recorded fluid quantity becomes the flow test
Refit all hoses
Start engine & top up fluid to the correct level and check for leaks

Note: If you are unsure which is the cooler return line, remove one line & have an assistant briefly start engine to check for fluid flow. Fluid MUST come from the line returning to the transmission AFTER the radiator/cooler.
Record reading:

For further information contact your local Repco store or call the BBE Tech Support line 1 300 BBE AUTO