I need to get better traction on the rear, I'm running 33/12.5/15's, with a corporate 12 blt, dana 44 in the front w/trac lk and 3.73's gears. I was told I had LS in the back when I bought the rig(then again-I was told i had 4.11 gears), I opened her up and found a carrier with 2 rods near the opening, one that had a little gear at the end lined up with a gear underneath the spider gear and a 1/2 inch log tab in the center. the oher rod had like a 3/4 inch long by 1/2 inch wide block in the center of it that would lock on to the other rod. I've never seen anything like it, maybe some one else has. My guess is that this is LS from factory.(?) Where could I get a good deal on a detroit locker for a 12 bolt? All responses welcome.