Looking to get a mechanical locker of some sort for my truck. It's 2wd, and I don't need 4wd but having a locking rear would help me out towing, and with the lack of bed weight, keep me from getting stuck in spots I shouldn't get stuck in.

Not to mention I got stuck on wet grass the other day, with one wheel on the driveway. Needless to say in a driveway with jeeps, it was a bit embarrassing. Bed is a feather in this truck!

Looking at something like a detroit or positrak. Anybody done this to a 2wd? I've got a Dana 80 rear w/ 3.55 gears.