Dana 70hd vs 70U

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

1984dually

Full Access Member
Joined
Aug 31, 2013
Posts
242
Reaction score
47
Location
Malin OR
First Name
Danny
Truck Year
1984
Truck Model
C30
Engine Size
8.1L
1984dually, 8.1l/nv4500/ Doug Nash underdrive. Current 70hd has 4.56 gears and want to go to 3.54. underdrive unit will drop the ratio to around 4.56 when towing. Can change the carrier and gears in the hd but have a 70u from a ford that is 3.54. Anybody use a 70u? Know it uses dana 60 carrier/pinion bearings and possibly a smaller size pinion. Opinions on strength of u vs hd rear ends. Moving pads etc not a problem.
 

Forum statistics

Threads
41,859
Posts
903,686
Members
33,372
Latest member
83elcowes
Top