a lot of it stems from the yoke off your t/case. the shaft binds within that yoke. you can try grinding it out a little, or try to get an aftermarket yoke. i know jb conversions has better yokes for this, but you may need their slip yoke elims to run it. DSI may have something for you as well. do you ever droop your rear end that low? that being both sides at the same time, like jumping it?