<b>Transfer Case</b><br><br>Because you must remove the Xterra's torsion bars to get to the T-case, first measure the ride height at both sides of the front end. The top of the fender lip is a good place from which to measure. Drain the T-case and disconnect the rear driveshaft. If the nuts are too tight, you can heat them a bit with a propane torch. (Kids, try not to set your truck on fire when you do this.) Then disconnect the T-case shifter linkage seen here. Index the torsion bars and remove them. Note: the torsion bar adjusters can be tricky to pull out. Remove the front crossmember. (If you have a manual transmission, drain the tranny too.) Finally, disconnect the electrical connections to the 'case.