4:10 or 3:73 ?
Possible upgrading to Ram dually. I'm pulling 12,500# gvw with SRW and 3.42 rear end. Usually lock 6th gear out. Plan is to move up to new 15,000# gvw 5th. Not sure if I want to get 4.10 or 3:73. Wh...
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IMHO there is only one "best of both worlds" that is the AISIN with 3.42's towing up to the 27-28K range. RAM even agrees just look at their chart.
My Son's Limited had AISIN with 3.42's and on a grade with around 27-28K combined the truck took off no issue and no axle wrap. My 11 HO RAM Dually had 3.42's and was great towing 28K, only exception was starting on a grade with the 68RFE it did struggle a bit. Towing at 60 or so the rpm was about 1,750 in 5th a perfect rpm basically the same as my current 15 with 4.10's in 6th.
3.73's just don't fit in the perfect world like the above do.
Chart says 29.300# combined for a 15 Dually 4x4 with AISIN.
My Son's Limited had AISIN with 3.42's and on a grade with around 27-28K combined the truck took off no issue and no axle wrap. My 11 HO RAM Dually had 3.42's and was great towing 28K, only exception was starting on a grade with the 68RFE it did struggle a bit. Towing at 60 or so the rpm was about 1,750 in 5th a perfect rpm basically the same as my current 15 with 4.10's in 6th.
3.73's just don't fit in the perfect world like the above do.
Chart says 29.300# combined for a 15 Dually 4x4 with AISIN.
