2018 SuperDuty DRW - 3.55 or 4.10 Gears?

shum02 wrote:

Westcoasting wrote:

BradW wrote:

Travlingman wrote:

4.10 DRW
6th gear: 70 = 2067

Finally got hold of a friend of mine who has a 2017 DRW F350 PSD. I thought he had the 3.55 gears, but it turns out he has 4.10 gears. He confirmed about 2050-2100 rpm at 70. I can live with that. So I will be ordering the truck with 4.10 gears.

Thanks all who submitted info on this thread, I'm sure there will be many people benefit from the info.

BradW

That is a great choice! I'm surprised by all the responses that say otherwise. I work in the oil patch in Alberta and our company has all Ford Trucks, the dually 4:10 is the best for any amount of towing :)

I have to agree. These are V8 diesel's that can and do love to rev. Don't think that down at 1700rpm's the engines are making enough heat to stay healthy but up at around 2k that should be the sweet spot for towing/hauling to keep them clean.

It's my thought having owned a 6.0L for a while that if Ford had put a minimum of 4:10's in all the trucks they'd have cut the problems of this motor in half. It loves to be hot and loves to rev - fuel mileage be damned! Add that along with frequent oil changes and issues diminish. JMHO.

Think about what your saying. An engine needs an amount of fuel to do the work required of it. At higher rpm it is a little less efficient but it is basically going to need the same amount of fuel as if it were pulling that load at a little lower rpm. However, there is a good chance the slower turning engine will be pumping less air than the higher revving engine.....less air for the same amount of fuel means more heat not less.