Spicer Single Drive Axles Service Manual: S110 and S130 - Manual (Page 50)

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Proper Vehicle Towing
Proper V
ehicle T
owing
Proper Vehicle Towing
Lift the drive wheels completely off of the ground or damage
will occur.
Do not lift the front wheels (non-drive wheels). This alters
the oil’s position in the drive axle, draining it away from the
drive pinion and its bearings. If the pinion is rotated under
these conditions for any period of time, bearings will over-
heat resulting in axle damage or failure.
This is impossible to lift the drive wheels, remove all axle
shafts to prevent gear rotation and cap the wheel hubs to pre-
vent loss of lubricant and a possible road hazard. See the fol-
lowing section Proper Vehicle Towing with Wheel Differential
Lock for removal procedure.
With Truetrac Limited Slip Differential
These differentials perform like conventional (open) differen-
tials under normal driving conditions - until traction control is
needed. Then the imbalanced gear forces automatically apply
resistance to the wheel (or axle) with the lesser traction.
Planetary pinion gears are supported in pockets of the case.
Each pinion meshes with its side gear and with a mating pin-
ion of the opposite planetary gear set.
When the vehicle experiences unequal side to side traction
(for instance on wet, muddy, icy or sand/gravel terrain), the
pinions resist rotation in the case and transfer torque from
one side gear to the other. All mating pinions tend to separate
from each other and from the side gears and they wedge into
their case pockets. This provides a friction force that retards
or prevents the wheel with lesser traction from rotating and
spinning out.
WARNING WARNING