I need this tool when rebuilding of a 9-1/4 rear differential on a Ram 1500. I was able to tighten the bearing adjusters to 150 ft-lbs. no problem. If you do a lot of work with this differential, two of these would be ideal so you don't have to move the tool from side to side. I had to readjust the adjusters several times to get the perfect preload and play.