I am at bottom perch setting on the ICON's right now.. Even with that setting what Netix is pointing out is the crappy IWE setup on these trucks.. Even at lower perch I shelled out both hubs during the SnoBall 500.. It was not from shifting from 2x4 to 4x4.. They are just a weak link.. And adding power to the truck will make this issue worse.. SDHQ is seeing if they can make a manual locking conversion (ie full floating hub) to eliminate this issue. Still in VERY earily development stages.. We have thrown out locking collar to physically lock the hubs an eliminating IWE all together.. It would work on 2010-2011 Raptors with open front diffs.. But on 2012 and up with torsens it would destroy tires, cv, diff, and god knows whatelse.