3/4" drive IR impact, no problem. They are either torqued to 600 or 800 ft/lbs depending on if the bolt is 2" or 2 1/2" long respectively.
I assume that you're going to pull the hubs for a seal replacement or bearings?
I built one of these and it made life a ton easier... did all 4 of mine last week in about 1 1/2hr.
