I'm not able to do verify it at this time. I don't have the newer FAST cd to compare the parts. If the pinion gear was the same and the seal was the same part #'s, then I would hazard an educated guess that it was interchangeable.

And we put DC's on slip yokes all the time. Jeeps may develop a leak if the t-case bearings are old and have play in them. With a newer vehicle, I wouldn't hesitate.