I have wheeled the hell out of my 2wd '61 Ford pick up. Running 31" A/T's, Granny 4spd, a locked 4.10 Dana 60-2 and a realy flexy suspension, I was able to go a lot of places people never thought I could, and I did it with ease. I would have never made it several times if it weren't for the rear locker. As far as street use the only time I noticed it is when I got on it in a corner and enguaged the locker and all that would do was cause me to spin the inside tire. If you ues your Eexplorer off-road you can't go wrong with a good locker. As far a installing an Auburn goes, if you don't have any experience installing gears it is proably best to pay a professional to install it for you.