2018 SuperDuty DRW - 3.55 or 4.10 Gears?

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

It might be too late for me to change your mind but I think going with 4.10s is a mistake. First of all there is absolutely no comparison whatsoever between the 6.0 and a new 6.7 Powerstroke. The 2017 Powerstrke is capable of making 304 HP at 1700 rpm. When cruising down the highway with a large 5th wheel in tow at 70 mph you might be needing 140 hp... The whole idea of overdrive gears is to slow the engine down when power isn't required.

Secondly you are taking advice from people on forums who base their opinions on their experience. I have no doubt that someone with a 2017 f350 dually would be happy with his 4.10 gears but that certainly doesn't mean he wouldn't be happy with 3.55 gears. Has he tried 3.55 gears. Engineers know what they are doing....it is very simple math for them to recommend the best gear ratio for various applications. The Ford engineers recommend 3.55 gears for an application like yours because it is the best choice. 4.10s will work, 3.55 will work better.



Edit: I was making the point that there is a huge difference between the 2006 6.0 to a 2018 6.7 Powerstroke. I mentioned that the 6.7 can produce 304 HP at 1700 rpm.....I should have also mention that the 6.0 was capable of around 160 HP at 1700 rpm. The 6.0 didn't reach peak torque until 2000 rpm.