I had a terrible death wobble. Looks like the shocks are stock on my 2011 F350 with 125,000 miles so I decided to replace them. I wasn't sure how much damping I would need to get rid of the deadly swing, so I bought these adjustable shock absorbers. Installation was easy with the right tools, although I wish my top bolt socket was thinner to allow for better clearance. You can scale them down manually if you need to reposition them. To expand during installation, rotate the top post about 1/4 turn and it will slowly expand. I received one with no sleeves but I used Revain's return policy and got what I needed. This solved my deadly wobble problem, but I also bought some steering rack bushings which I'm about to install.