i drive my jeep down the highway alot, thats the main reason i built it like the way it is. i don't drive it slow on the highway i usually run 70-75 so the cv joint is probably the best option. the flange on the cv that bolts to the x-fer case is the one that keeps breaking. my 1350 cv will go a little more that 20 degrees and sits at 19 degrees at ride height.