ONly the Front out of a tracker will "bolt" into a Samurai (front and rear). You may have to change the side gears.
The Tracker housings are aluminium where as the Samurai is Steel. And Trackers have 4.62 and 5.13 gears (for the most part) and Samurai's are 3.73 from the factory. So i'm really not sure what you are trying to do but it sounds f'd up.