Checking and Topping Up ATF

Checking and topping up ATF

Information

Test conditions with cooler lines closed

- ATF cooler line was not opened between thermostat and ATF cooler.

For example: changing transmission, replacing sealing ring on transmission, changing ATF filter, general checks.

^ Warm up transmission in lower load range. Switch all transmission ranges several times while doing so.
^ Read out ATF temperature using the PIWIS Tester.
^ ATF temperature: 40°C.
^ Selector lever is in position P.
^ Test and filling process at idle speed.

Test conditions after opening cooler lines

- ATF cooler line was opened between thermostat and ATF cooler.

For example: replacing ATF, changing ATF line, changing ATF cooler, changing ATF thermostat.

^ Warm up transmission in lower load range. Switch all transmission ranges several times while doing so.
^ Read out ATF sump temperature using the PIWIS Tester.
^ The ATF temperature must be 90°C (coolant circuit open).
^ Let ATF cool down to 40°C.
^ Selector lever is in position P.
^ Test and filling process at idle speed.