Just a thought here..
I had a draw tight with slightly oversized tires. The fact that the draw tight didn't angle back as much as other hitches, forced the spare tire into the back of the dif and the cross over brake line, causing rubbing against the brake line against the dif. I was able to move the brake line up out of the way, but eventually replaced the hitch with one that angled to the rear more. There is a trade off there regarding departure angle.