So a little about my rig.
It an 07 with full OEM skids, Frankenlift 2, JBA 4.5 Arms, ARB with Warn M8000, and duratrac load C tires.
Before the swap to 4.10's the tranny would have to down shift to make it up any sort of hill (I live outside DC). When down shifting the RPM's would go up to...