26–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle can not drop. Failure to follow these steps
could result in serious personal injury or death.
26–01 Detroit
™
Automated
Transmission Fluid
Change and Magnetic
Plug Cleaning
NOTICE
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmis-
sion. Overfilling will force fluid out of the case
through the main shaft openings.
Do not mix types or brands of fluid, because of
possible incompatibility. Do not use fluid addi-
tives, friction modifiers, or extreme-pressure gear
fluids.
IMPORTANT: Drain the transmission when the
fluid is warm. If not already warm, run the en-
gine until the transmission fluid reaches operat-
ing temperature. Shift the transmission to neu-
tral (N) and shut down the engine.
1.
Apply the parking brakes, and chock the rear
tires. Place a large drain pan under the transmis-
sion.
2.
Clean the area around the fill plug, then remove
it from the side of the gear case. Remove the
drain plug from the bottom of the case. See
Fig. 1
.
3.
Clean the fill plug and the drain plug.
4.
Remove the oil pump screen and check it for
debris. See
Fig. 2
. Clean the screen, if needed,
then install it with a new seal washer. Tighten the
plug 90 lbf·ft (120 N·m).
5.
Install a new seal on the drain plug, then install
the plug and tighten it 45 lbf·ft (60 N·m).
NOTICE
Detroit transmissions use synthetic lubricant that
meets the requirements of the MB 235.11 specifi-
03/31/2014
f270167
1
2
1.
Drain Plug
2.
Fill Plug
Fig. 1, Drain and Fill Plugs, Detroit Automated
Transmissions
02/21/2014
f261459
1
2
3
4
1.
Spring
2.
Screen
3.
Seal Washer
4.
Plug
Fig. 2, Oil Pump Screen, Detroit Automated
Transmissions
Transmission
26
Cascadia Maintenance Manual, March 2016
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