I finished the installation of my superlift select series traction bars last night. I didn't get a chance to test drive last night so I did it this morning. For the last 4-5 months I have been experiencing a hopping feeling coming from the rear of the truck between 40-65 mph. I have had the balance on tires checked and even had the bearings and axles checked with nothing wrong. After the install of the trackbars the hopping is completly gone!!! I am waiting to have the pictures approved, when they are I will post some pics with this thread.