I put an E-locker in my front hp30 and a TT in my rear tirdy5.
With over 10k miles on this setup I don't think there is a better one for MY jeep. With the front locked while side hilling the rear does not push; it just follows the front. Since we see a lot of snow here when I shift into 4wh with the front not completely locked and the rear TT does its thing. Amazing on snowy roads.
I make it everywhere everyone that I wheel with does in trail only rigs locked f/r and some places they can't cause the rear axle doesn't push the front.
Building my junk with more junk, so Im always on the look out for more junk....Free to cheap preferably. :D
My junk http://www.jeepforum.com/forum/f22/survivor-project-driveway-frame-swap-33s-build-1280626/index3.html