MadMarx

I don't think the term "float" is in this case not related to the halfshaft, it is related to the diff housing. It is very easy to remove the diff from the axle. I guess that they mean with floating, that you can slip out the diff-arrangement as a whole.

The IMSA cars had upgraded axles....in case of the Canadian #42 car it is a '68 28 spline Mustang floater axle. These axles do have pressed on roller bearings with securing ring. On the photo the securing ring was cracked with drilling a hole in it and slamming with a chisel and a hammer on the tiny bore to crack it open. After that on a hydraulic press the bearing is removed from the axle shaft seat. To fit the new roller bearing the bearing and securing ring is fit in place and and pressed on with about 5 tons of pressure.