I have a 60 HD with 35 spline shafts, will it hold up to the torture a 70 will? What are the differences 60hd vs 70

 

I believe the only difference is the ring gear diameter. All bearings are the same as long as it isn't a 70HD.

 

My opinion is that it depends on use. For a DD i'm sure it would hold up fine, but for towing everyday and heavy, probably not for very long.

 

How do you tell the difference just by looking externally ? Pics ?

 

The three 60hd's I've had only had 30 spline shafts. Two were from mid to late 70's Dodge's the other a 91 D250 gasser. Seems like the axle shaft diameter was smaller as well, 1 1/4" vs. 1 1/2". Of course Dodge is diffrent and you can have two of the same rear ends, same year etc, but internally have something different about them.