[jfaberna]

I have the 2014 3500 DRW 8' bed Crew cab. Standard tranny and 373 rear end. I pulled my 16,000lb Monty over 11,000' mountains at 65mph with no issues. If you had a 24,000lb 5th wheel then spring for the Aisin.

The key observations I've noted about the 3500 SRW vs. DRW is height. the DRW use the 17" heavier load capacity wheels than what you get on the 20" wheels on the SRW. That extra height of the 20" wheels makes towing the Monty level a real challenge. My 3500 from the factory rides high in the back, but when I hitch up the Monty, it's perfectly level and so is the RV.

It's not clear to me why the SRW trucks have to sit so high off the ground. That's just bad for heavy weight towing or hauling.