2018 Ram Dually and Arctic Fox 990
I first had a 2015 Ram 3500 Dually tradesman 4wd Cummins when I got my 990. I have run the 2015 across the scales and including tong weight of 7x14 trailer (motorcycle inside) and 1/2 tank of water, ...
Forum Discussion
FireGuard wrote:
Good info.
Curious to see how you like the 3:73 gears for a TC application?
I’ve got my eye on a 18 Laramie/Aisin but it has the 3:42 gears. Probably ok for a TC and towing light, but not sure if 4:10 would be better.
my 2006 had the G56, which has the wrong Overdrive ratio in 6th. I think it was doing 2200 RPM @ 70mph.
I can't get the gear ratio chart to work but I think my 3:73 are around 400-500 RPM less than my 4:10's were in the 2015.
The power difference on paper between the 2 truck more than makes up for the difference in RPM. I think I am doing around 1 to 2 better MPG when running at higher speeds. Is this because of the ratio? or because of the lack of 4wd? or the fact last truck has factory AT tires on it when new truck has highway rib style?
in live in Central PA area and travel the coast a lot, so its mostly rolling hills. downshifting is not a problem. and the 1st gear is low in the Aisin so no problems pulling out my 14% grade driveway.
