You can do it in the truck but adjusting it will be a b*tch. Unless your painting Id leave the housing in and pull the carrier/torque tube assembly from the housing. Once you pull the axles all you need to do is unbolt the 12 nuts holding it onto the front of the housing and the whole carrier/torque tube should come right out.
I stood mine up between saw horses and drilled a hole in a hunk of 2x6" for the torque tube to sit on and the driveshaft to sit IN the hole while adjusting. Its extremely heavy and awkward and would probably be better having 2 people do it, I swore at it a LOT!
Didnt help but it made me feel better!
If you do decide to do it in the truck the most difficult part is making darn sure you DO NOT crinkle the shims. This is absolutely critical!!! If you do it this way Id put a very light dab of grease on the bearing face so the shims will stick when you slide the driveshaft into the tube. A touch of grease may give a false reading on the ring and pinion when you measure since your dealing in thousands of an inch.
Good luck! Jeff
