my truck has 4.88s in rear 4.56 in front (don't ask). I am the sole owner of this setup. it's only been shifted into 4wd in soft sand 5 times or so to get unstuck then back into 2wd. It got stuck, I took out the front driveshaft and drove home in 4 lo (very slowly). I started by trying reverse/rocking the truck (w/o the front shaft) I pulled the t case shifter and the fill/drain plugs, everything is clean, so I'm wondering if there is a simple fix or do I have to pull and crack this thing?