I'm curious what axels are on my 87, its an F-250, 460, c6, 4x4, the rear axel code is 35, front GAWR 3559, rear GAWR 6084, with a warner 1356 t-case, 8 lug. im not sure how much of this info is useful, and what more will be needed, thanx for the help.

 

Without researching numbers, I'd imagine that it has a Dana 50 TTB up front and a Dana 60 out back. That would be the common setup.

 

I would say Dana 50 TTB front with a Sterling 10.25 rear.