Yachtcare, 2 reasons that I said that. First I didn't know what kind of vehicle. Second, and major reason is you might have an enormus impact with big power and I didn't want you to break something. I have a 1/2 inch drive impact and use max air pressure (about 110 cause thats what my compressor kicks off at). Never had trouble breaking one loose yet but there is always a first time. When reinstalling I just clean up the thread on the pinion and nut with some solvent (like carb cleaner) when it dries I put Locktite on the threads, start the nut and run it up as far as it will go (to insure no cross thread or damage) then I tighten it as tight as my impact will go and let it hammer a couple of seconds. My impact is not terribly powerful.