4:10 or 3:73 ?

Will you use the new TV much other than for towing? Will you frequently be in the Sierras or Rockies?

Tough call!
Either will do the job.
Will you be towing in the mountains much? Driving empty often?

I think I would go to the 4:10 I did, if for some reason that seems a bit steep you can always go with a slightly taller tire. I do not pull that much weight but put on 4:10 with my 35 in tires and it is working good for me. just thought

Me I'd do the 3.73.......

4.10

Why trade. We tow a 16K 5th wheel with a SRW and 3:42's work great. Chris

Me Again wrote:
Why trade. We tow a 16K 5th wheel with a SRW and 3:42's work great. Chris

I agree with this. You already have enough truck. And I'm not sure why you are locking out 6th with your current trailer. Sure isn't necessary.

As for your question, I have 4.10s. And I wouldn't buy them again. Just don't need them with the new trucks - plenty of power, don't really need the low gears.

Bionic Man wrote:

Me Again wrote:
Why trade. We tow a 16K 5th wheel with a SRW and 3:42's work great. Chris

I agree with this. You already have enough truck. And I'm not sure why you are locking out 6th with your current trailer. Sure isn't necessary.

As for your question, I have 4.10s. And I wouldn't buy them again. Just don't need them with the new trucks - plenty of power, don't really need the low gears.

60MPH is 1750 RPM with 3:42's. My Aisin will not shift to 6th in T/H until 65 MPH, and I do not tow that fast normally.

It is all related to the tall gears using it the way RAM designed. Chris

I opted for the 4.10 gears vs the 3.73 and tow between 16-17,000 lbs. If I had to do it again, I'd go for the 3.73 for the fuel mileage. Big hills still find me at 35-40mph (I-70 headed west from Denver).

Highway, I might peak into 13mpg. City driving, 10mph. Towing, 8-9mpg.

To OP the dually with Aisin and 3:42's is rated to tow 20,520.

Like your current truck with 3:42 gears, you can have your cake and eat it too. Chris