NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post

V · 10-11-2012, 02:17 PM

Can I change the center diff in a Dana 70 without having to re-lash the gear set?

basically the vehicle has an open rear with 3:55 gears.
I want to pull the open diff and swap in a posi unit, using the same 3:55 gears set.

Can i do that? or is it not recommended. I don't see why it wouldn't be OK, since the pinion gear isn't changing depth and the ring gear must spin centered on the new differential. As long as the posi is designed for that application, the ring gear mounting flange should be the same tolerance as stock so it should be in the same place...right? lol

Its a Dana 70 floating 8 lug rear.

10-11-2012, 02:17 PM	#1
V Stalker Join Date: Aug 2004 Posts: 12,077 iTrader: (12)	changing differential... Can I change the center diff in a Dana 70 without having to re-lash the gear set? basically the vehicle has an open rear with 3:55 gears. I want to pull the open diff and swap in a posi unit, using the same 3:55 gears set. Can i do that? or is it not recommended. I don't see why it wouldn't be OK, since the pinion gear isn't changing depth and the ring gear must spin centered on the new differential. As long as the posi is designed for that application, the ring gear mounting flange should be the same tolerance as stock so it should be in the same place...right? lol Its a Dana 70 floating 8 lug rear.