My Duster and my old M.W. stocker had them My Duster went 10.34 at 128.6 MPH weighing 3450 lbs with a 1.43 60 ft. times they would still be in the car if the 8 3/4 non braced rear end housing hadn't bent up bad enough to tear the ladder bar brackets of the housing The straps stop the for and aft movement, there not intended or designed to bear any of the side loading from the U joint cup, the straps are designed to keep U joint cup in the pinion yoke and prevent any forward or rearward movement of the U joint cups in the pinion yoke As long as you use a good, solid trunion shaft H.D. 7260 joint and a good pinion yoke you should be good BTW, there are two different sets of straps, one for thee 7260 and a different set for the 7290 Don't mix them