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SERVICING AND MAINTENANCE
Selection Of Lubricant
It is important to use the proper transmission
fluid to ensure optimum transmission
performance and life. Use only the
manufacturer’s specified transmission fluid
page 444. It is important to maintain the
transmission fluid at the correct level using the
recommended fluid. No chemical flushes should
be used in any transmission; only the approved
lubricant should be used.
R
EAR
A
XLE
A
ND
4
X
4 F
RONT
D
RIVING
A
XLE
F
LUID
L
EVEL
For models with 9.25 in Front Axles and 11.5 in
page 444. 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
For the proper maintenance intervals
CAUTION!
Using a transmission fluid other than the
manufacturer’s recommended fluid may cause
deterioration in transmission shift quality and/or
torque converter shudder, and (for six-speed
transmissions) will require more frequent fluid
1 — 4500/5500 Rear Axle Fluid Fill Plug
2 — 4500/5500 Rear Axle Fluid Drain Plug
21_DPF_OM_EN_USC_t.book Page 390