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.

Pilot Bearing Inspection
Inspect the crankshaft pilot bearing for wear and damage.
Inspect the inside surface of the crankshaft pilot bearing with your
finger. If the crankshaft pilot bearing is not smoot ...
Output Shaft (Countershaft) Speed Sensor Replacement (M/T)
M/T
Raise the vehicle on a lift.
Disconnect the output shaft (countershaft) speed sensor connector (A).
Remove the output shaft (countershaft) speed sensor (B).
...
Inspection
Install the 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 a full ...