Rear: Ranger left side rear axles. Or Aerostar right rears...heres the interchange
Aerostar '86-91 Rear Axle; Ford, R.
Aerostar '92-97 Rear Axle; R.
Bronco II '84-90 Rear Axle; L.
Ranger '83 Rear Axle; 10 bolt hsg cover, L.
Ranger '84 Rear Axle; 10 bolt hsg cover, 7-1/2" ring gear, L.
Ranger '85-86 Rear Axle; 7-1/2" ring gear, L.
Ranger '87-92 Rear Axle; L.
for the fox length rear axles for a 5 lug. but when you look it up at advance or rock auto there are 9 and 10 inch drums. which one is it? i think its 9? but whats preventing me from finding a 10 at a junkyard and buying that.
I know the Aerostars I got my axles from both had 10" drums, so as far as the axles are concerned, there should not be a difference between 9" and 10" drums. Now if you want to use the 10" drum brakes, you will need to get all the parts like Mike said.