Make sure you go to a shop that does ring and pinion installs regularly. I just got my front diff regeared at Drivetrain Direct in Corona...took about 4 hrs for the front diff since they had to remove part of the front IFS crossmember (had to get it re-aligned after that). I watched the install. No, they don't torque every bolt down w/ a torque wrench...have yet to see a mechanic do that. But the guy does multiple installs every day...he could tell how tight too torque the pinion nut (I guess the pinion preload) by feel. He got the ring backlash and centering right the first time, pinion was a little too far in so it took a second attempt (thinner spacer) to get it just right. I ordered Precision Gears, as they are a superior gear distributor. The guy wasn't very excited about IFS...said he works on his brother's '85 Toyota 4x4, and he really likes the solid axle for strength. Price was $350 for the front gear install (I think the rear is $300), including installation and gear setup. Many shops charge $300 for installation, then $200+ to setup the gears.