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.

Brightness Control
When the parking lights are turned on and the
ignition switch is in ON , you can
use the
(select/reset) knob to adjust
instrument
panel brightness.
Brighten: Turn the knob to the right.
...
Dashboard Passenger's Tray Lid Removal/Installation
NOTE: Take care not to scratch the dashboard or its related parts.
Open the lid.
Remove the screws, then remove the passenger's upper tray lid (A).
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A/T Housing Idler Gear Shaft Removal and Installation (A/T)
Remove the snap ring (A), the cotter retainer (B), and the cotters (C)
from the idler gear shaft (D), then remove the idler gear shaft. Do not
distort the snap ring.
Check ...