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.

Maintenance
This section explains why it is important to keep your vehicle well maintained
and how to follow basic maintenance safety precautions.
This section also includes instructions on how to read the mai ...
Shift Fork Disassembly/Reassembly (M/T)
NOTE: Prior to reassembling, clean all the parts in solvent, dry them, and
apply MTF to all contact surfaces.
...
A/T Secondary Shaft Sealing Ring Replacement (A/T)
The sealing rings are synthetic resin with chamfered ends. Check the
condition of the sealing rings, and replace them only if they are worn,
distorted, or damaged.
For a better fit, squeeze ...