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.

A/T Clutch Pressure Control Solenoid Valve B and C Replacement (A/T)
Remove the air cleaner assembly.
Remove the breather hose (A) from its clamp (B), and remove the breather
hose clamp bracket (C).
Disconnect the connectors (A) ...
Rocker Arm Assembly Installation
If the rocker arm assembly is disassembled, reassemble the rocker arm
assembly.
Apply engine oil to the end of the valve stem.
Install the rocker arm assembly.
...
Clutch Interlock Switch Replacement (M/T)
M/T model
Disconnect the 2P connector (A) from the clutch interlock switch.
Loosen the locknut (B), then remove the clutch interlock switch (C).
Install the clutch int ...