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402 SERVICING AND MAINTENANCE
NOTE:
If it is necessary to check the transmission below
the operating temperature, the fluid level should
be between the two COLD (lower) holes on the
dipstick with the fluid at 68-86°F / 20-30°C.
Only use the COLD region of the dipstick as a rough
reference when setting the fluid level after a trans-
mission service or fluid change. Re-check the fluid
level, and adjust as required, once the trans-
mission reaches normal operating temperature.
Fluid And Filter Changes — Eight-Speed
Transmission
Under normal operating conditions, the fluid
installed at the factory will provide satisfactory
lubrication for the life of the vehicle.
Routine fluid and filter changes are not required.
However, change the fluid and filter if the fluid
becomes contaminated (with water, etc.), or if the
transmission is disassembled for any reason.
Fluid And Filter Changes — Six Speed
Transmission
Refer to the “Maintenance Plan” for the proper
maintenance intervals.
In addition, change the fluid and filters if the fluid
becomes contaminated (with water, etc.), or if the
transmission is disassembled for any reason.
REAR AXLE AND 4X4 FRONT DRIVING
A
XLE FLUID LEVEL
For normal service, periodic fluid level checks are
not required. When the vehicle is serviced for other
reasons the exterior surfaces of the axle assembly
should be inspected. If gear oil leakage is
suspected inspect the fluid level. This inspection
should be made with the vehicle in a level position.
To check the axle fluid, park the vehicle on a level
surface. Take a piece of wire (or zip tie) and make
a 90 degree bend two inches from the end of the
wire. Insert the wire into the fill plug hole and use it
like a dipstick. Remove the wire and measure from
the 90 degree bend to the oil level.
For the 2500 (Non-Power Wagon) axles, the fluid
level should be 4/5 in ± 1/4 in (20.3 mm ±
6.4 mm) below the fill hole for the rear axle and it
should be 1/4 in ± 1/4 in (6.4 mm ± 6.4 mm)
below the fill hole on the front axle.
For the 2500 Power Wagon and all 3500 model
axles, the fluid level should be 1/4 in ± 1/4 in
(6.4 mm ± 6.4 mm) below the fill hole on the
9.25 in front, 11.5 in rear axle, and 12.0 in rear
axle.
Drain And Refill
Refer to the “Maintenance Plan” for the proper
maintenance intervals.
Lubricant Selection
Refer to “Fluids And Lubricants” in “Technical
Specifications” for further information.
NOTE:
The presence of water in the gear lubricant will
result in corrosion and possible failure of differ-
ential components. Operation of the vehicle in
water, as may be encountered in some off-highway
types of service, will require draining and refilling
the axle to avoid damage.
Limited-Slip Differentials
DO REQUIRE limited slip
oil additive (friction modifiers).
NOTE:
Slight noise and mild shuddering may be evident
while turning a vehicle with limited slip differential
on concrete or dry pavement. These conditions
should be considered normal operation of the
limited slip differential.
CAUTION!
If the fluid temperature is below 50°F (10°C) it
may not register on the dipstick. Do not add fluid
until the temperature is elevated enough to
produce an accurate reading. Run the engine at
idle, in PARK, to warm the fluid.
20_DJD2_OM_EN_USC_t.book Page 402
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