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 TM 9-8000
their ends, engage similar V-shaped slots In the
situated between the side gears to wedge the clutches
differential case. Each side gear is backed by a series of
into the case.
multiple disk clutches. Operation is as follows:
(1) Straight Ahead.
In a straight-ahead
(1) Stralght
Ahead
(A,
position, the axle shafts will turn at the same speed, and
Whenever the differential case attempts to rotate the
operation virtually will be the same as a conventional
side gears through the side gear pinions and shafts, the
differential.
shafts will slide up their V-shaped ramps and exert
(2) Around Comers. Around a corner, the
outward pressure. This outward pressure will tend to
lock the side gears to the differential case through the
Inner drive wheel must slow down. The unequal speed
clutches.
between the side gears will cause the side gear pinions
to walk around the side gears. This walking will cause
the outer axle shaft to rotate faster than the differential
vehicle turns a corner, the Inner drive wheel must slow
case. Because the cones have spiral grooves cut Into
down. The unequal speed between the side gears will
their clutch surfaces, the Inner cone clutch will draw Itself
cause the side gear pinions to walk around the side
Into the case and lock tight and the outer cone clutch will
gears. This walking will cause the outer axle shaft to
back itself out of the case and allow the outer drive axle
rotate faster than the differential case, allowing the pinion
to freewheel. The end result is the majority of the engine
shaft on that side to slide down Its ramp. This releases
torque being sent to the Inner drive wheel.
the outer clutches, causing the differential to act like a
(3) Slippage of One Wheel. If one wheel loses
conventional unit.
traction, all engine torque will be transferred
c. Cone Clutch Type (Flg. 29-7). The cone clutch
no-spin differential uses two spirally grooved cones that
fit into the housing. These cones fit behind the side
gears and are splined to the axle shafts. Coil springs are
Figure 29-7. Cone Clutch-Type No-Spin Differential.
29-7
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