Hey guys! question for ya'll, I went wheeling in my truck (03 FX4 lvl2 5speed) with my friend and noticed a almost burning rubber smell after sliding up an icy incline once i had gotten out of my truck at the top. I didn't think too much of it until next time i went out and was just crawling through a snowy field in 4x4 that i smelt it again. Any ideas what it could be?