A TruTrac is a torque sensing/biasing mechanism.
The problem is that if one wheel has no traction the diff
cannot sense any torque going to that wheel, and cannot
bias torque to the wheel with traction.
"The car will not move with one of the wheels in the air. If one wheel is in the air or has no traction at all, it will only take very little torque to turn that wheel. It is necessary to apply torque to the gears to generate the required thrust force to maintain the bias ratio. Without torque, the gears will not be pressed together and no friction will be generated, so the gears can rotate freely. The unloaded wheel will have high speed, but can only transfer very little or no torque. The helical LSD will send torque to the wheel with traction according to the bias ratio, BUT four times zero still equals zero. This means the wheel with grip will not receive any torque and the LSD acts as an open differential."
From https://kmpdrivetrain.com/differentials … ferential/
You might be better of with a welded diff.
Capt. Delinquent Racing
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