I don't think they will at all. The front has a different diameter ring gear in the tracker, and the rear may be close to the Samurai, but there are two different gearsets used on the sidekick rear. One has the same bolt pattern (10 bolt, I believe) one a 12 bolt. The 10 bolt gearset is a mod for the Samurai, and I think an additional shim is placed behind the pinion gear to set depth properly in the Sami. So going the other way, the pinion might likely not be able to be set in deep enough.