Most of the time when I am on snow runs I only run the rear locker, unless I am messing around, and then I play with them both. I have mine set-up so I can turn the front on with out the rear on. What I like about the ARB's is they are almost instant engaging. When you are rock-crawling, this is a big plus. Whereas the Rubicon/PW, Toyota E-locker, and the Eaton do not always engage as soon as you hit the switch. At least that has been my experience with them. Do not know about the OX, never driven one.

 

Eatons engage instantly, and as long as you have 90psi, so will your ARBs.

 

whats best for a rig with a limited slip in the rear already? is it really worthwhile or just for rock crawling and how much are we talking about? How hard is the install?