LSD being defined as a clutch operated limited slip system for the left rear tire. The left tire in US cars will generate about 85% of the drive of the right when new.
As the clutches wear, it transfers less and less.
The Detroit-lockers, as used in the '65 Shelby GT350, are a ratcheting locking device that transfers drive from one side to the other, not both.
The ZF, all though indicating that it is of the clutched limited slip design, seems to react like the Detroit locker does, but with clutches.
When both tires are off of the ground it seems to search for the drive wheel and often will confuse onlookers to mimic some traits of an open differential.
If I am not mistaken off the ground the ZF left tire just doesn't turn when the right does, as opposed to turning opposite in an open differential.
The test for correct locking pressure for a US limited slip would be to keep the right tire on the ground, jack the left tire and read the amount of force necessary to turn the wheel. The desired number should be around 185 ft-lbs.
The ZF doesn't seem to want to do that.
Confusing isn't it? It shouldn't be but it is?
