Its highly recommended to maintain the correct geometry at the transfer case. Without it you'll likely have issues/failures sooner rather than later. Another issue I've heard of is the actual driveshaft coming out due to axle wrap. Traction bars are the ultimate fix for that. You're already looking at $1000 plus whatever labor you have to put that lift on. Spend the extra 70 bucks and get one from PRG. Install is simple...it mounts on the end of your driveshaft on the rear dif end of the truck. If you get one from PRG..order it today...Greg seems to get backed up and shipping may take 2 weeks.