Follow these instructions to keep the ATF cooler cleaner working properly:
Replace the two magnetic nonbypass spin-on filters after every 20 hours of use, based on the hour meter, or when you notice a restriction in the ATF flow.
Check the level and condition of the fluid in the tank before each use.
Replace the ATF in the tank when it looks dark or dirty.

Inspection
Install the flange nut on the damper shaft end, and set the socket wrench
and T-handle on the nut.
Compress the damper assembly by hand, and check for smooth operation
through ...
HFL Menus
Use HFL when the vehicle’s ignition is in the ACCESSORY (I) or ON (II)
position.
You can operate HFL by voice when on the PHONE screen. Below is the flow chart
showing available voice commands ...
Transmission End Cover Transmission Fluid Pressure Switch Replacement (A/T)
Remove the transmission fluid pressure switch A (2nd clutch) (A).
Make sure there is no water, oil, dust, or foreign particles inside the
connector.
Install the new tr ...