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Is There a Difference Between 2500 and 3500 Rear Axles?

18K views 18 replies 12 participants last post by  long-time-dmax 
#1 ·
Is the 2500 HD rear axle and the 3500HD srw axle the same? I know that the suspension capacity ( 6200 #'s vs 7050#'s) is different due to the number of springs--But I'm wondering if there is any real difference between the axle design and construction between the two--I would guess not. It is my understanding that the drive trans are identical. Is that correct?
 
#12 ·
You will be fine with the air bags. You will have the 2500 ride and the 3500 tow capacity. I have the bags and on board air and it is the tits!
 
#11 ·
I know that in the 2012 HDs, the 2500 gasser came with 10.5 and the 3500 gasser came with 11.5. I compared them before I bought my 3500 gasser.
Dmax were 11.5 in both 2500 & 3500.
 
#19 ·
Starting in 2020 m.y. they changed it up. The 2500s come with a smaller differential than the 3500s. 1" difference. 10.5" vs. 11.5" I think? As far as I know, same axles and such, just a bigger ring gear in the 3500s.

Before that, to my knowledge, 2500 and 3500 were all the same size everything but rear springs.
 
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