Spicer Single Drive Axles Service Manual: S135L, S135N, S135S, S150L, S150N, S150S - Manual (Page 43)

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Proper Vehicle Towing
Proper V
e
hicle T
owing
Torque Flow
While driving with equal load on and equal traction under both
drive wheels, the Truetrac differential provides equal torque to
each wheel. With unequal load and/or traction on each drive wheel, a
major portion of the torque will be transferred from one side
to the other to reduce the chance of a one wheel spin-out.
1 - Torque flow distribution while operating with equal
loading and ground coefficient
1
1 - Torque flow distribution with less load over or ground
coefficient under left wheel
1