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336 SERVICING AND MAINTENANCE
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 models with 9.25 in Front Axles and 11.5 in
Rear Axles, refer to “Fluids And Lubricants” in
“Servicing And Maintenance” for further
information. 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.
When checking the fluid level, the vehicle
should be in a level position. The fluid level at
room temperature should be as follows:
3500 Front Axle: ¼ inch ± ¼ inch (6.4 mm ±
6.4 mm) below the bottom of the fill hole.
3500 Rear Axle: ¼ inch ± ¼ inch (6.4 mm ±
6.4 mm) below the bottom of the fill hole.
4500/5500 Front Axle: ¼ inch +/- ¼ inch
(6.4 mm ± 6.4 mm) below the bottom of the fill
hole.
4500/5500 Rear Axle: 1/8 inch +/- 1/8 inch
(3.2 mm +/- 3.2 mm) below the bottom of the
fill hole.
Drain And Refill
On 4500/5500 vehicles, remove the lower bolt
to drain the axle fluid.
4500/5500 Rear Axle Plugs
Refer to “Scheduled Servicing” in this chapter
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.
1 — 4500/5500 Rear Axle Fluid Fill Plug
2 — 4500/5500 Rear Axle Fluid Drain Plug
20_DPF_OM_EN_USC_t.book Page 336
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