Typical TrueTrac differentials are shown above. As with a conventional differential, the TrueTrac side gears are interconnected by pinion gears, which allow one wheel to slow down or speed up as required.

TrueTrac gears have spiral teeth, and the pinions are mounted in pockets in the case.
If one wheel begins to lose traction, the pinions separate slightly from the side gear, and wedge in the
pockets. As input torque increases, the separating force increases, thus slowing or stopping the
spinout. This allows torque to be distributed to the wheel with the best footing.
Note: TrueTrac differentials require a certain amount of resistance at the ground in order to start
the power transfer. A TrueTrac differential may not transfer power if the spinning wheel is off the
ground. If spinning occurs, often a light application of the brakes, while carefully applying power,
will slow the spinning wheel enough to allow the TrueTrac differential to transfer torque to the
other wheel.