Just to compile the info here, and add a little:
Front tracker thirds fit in the samurai axles.
Used in the front, they bolt in.
Used in the rear, you swap in your samurai side gears first.
In the front the aluminum third member will hold up prety well, but the rear should have the gears swapped to the Samurai steel third member.
Besides, the Samurai carrier is a 4 pin carrier (stronger). you will need to add a shim to the ring gear and a aftermarket retainer ring for the cross pins (or tack weld the cross pins in place)
Remember, only the Tracker front thirds and gears fit the samurai axle housings.
Its prety simple really.
hope that clears it up for you.
Last edited by orionn; September 8th, 2011 at 11:06 AM.