4.10 rear in new Ford F350
A lot of leftovers have the 4.10 rear any one know if there would be a big difference in MPG towing or would it be negligible..?
Forum Discussion
- We have a new '19 F350 diesel DRW w/ 4.10's - 15k trailer and 2k trip averaged about 11 mpg...
Huntindog wrote:
4x4ord wrote:
Ummm. Fords max specs need the 4.10s. OP doesn't state what he will be towing. Just that he will have a 5500# camper, AND towing something occasionally.. He may be pushing that truck pretty hard.
The differeonce in 60mph high gear cruising rpm between 3.55 and 4.10 is 1524 rpm vs 1760 rpm. The power required to tow a 16k 5ver at 60 mph on level ground is only about 100 hp. The 6.7 can produce 320 hp at 1800 rpm. When peak hp is needed in the hills the 4.10 rear gears will have the transmission in 5th and the engine running 2260 rpm at 60 mph. The 3.55 gears would put the transmission in 4th gear with the engine running 2616 rpm. So the 3.55 gears are going to out pull the 4.10 gears on hills that the truck is capable of climbing at 60 mph. It takes a pretty steep hill or a very heavy trailer before the 4.10 gears offer the advantage.
Yep Exactly! The 4.10's are the way to go. It'll walk right past a similarly loaded 3.73 truck.4x4ord wrote:
Ummm. Fords max specs need the 4.10s. OP doesn't state what he will be towing. Just that he will have a 5500# camper, AND towing something occasionally.. He may be pushing that truck pretty hard.
The differeonce in 60mph high gear cruising rpm between 3.55 and 4.10 is 1524 rpm vs 1760 rpm. The power required to tow a 16k 5ver at 60 mph on level ground is only about 100 hp. The 6.7 can produce 320 hp at 1800 rpm. When peak hp is needed in the hills the 4.10 rear gears will have the transmission in 5th and the engine running 2260 rpm at 60 mph. The 3.55 gears would put the transmission in 4th gear with the engine running 2616 rpm. So the 3.55 gears are going to out pull the 4.10 gears on hills that the truck is capable of climbing at 60 mph. It takes a pretty steep hill or a very heavy trailer before the 4.10 gears offer the advantage.- The differeonce in 60mph high gear cruising rpm between 3.55 and 4.10 is 1524 rpm vs 1760 rpm. The power required to tow a 16k 5ver at 60 mph on level ground is only about 100 hp. The 6.7 can produce 320 hp at 1800 rpm. When peak hp is needed in the hills the 4.10 rear gears will have the transmission in 5th and the engine running 2260 rpm at 60 mph. The 3.55 gears would put the transmission in 4th gear with the engine running 2616 rpm. So the 3.55 gears are going to out pull the 4.10 gears on hills that the truck is capable of climbing at 60 mph. It takes a pretty steep hill or a very heavy trailer before the 4.10 gears offer the advantage.
Grit dog wrote:
Gas or diesel and towing what?
4:10s are only available in the DRW diesel in the 350. Need to step up to the 450 to get 4:30s. And the 450 only comes with the diesel.
4:30s only in the gasser.- ^ Lol, right?
Methinks the OP doesn’t know there’s a difference.
In short. Gasser, if towing anything significant, get the deepest gears you can for the best performance. Diesel has 2x+ the torque of the gasser so you can tow pretty heavy with taller gears easily. - OK, its your secret about fuel. There is a large difference in RPM, and therefore required gear ratios between gas and diesel. Yes, I know that 4.10 is offered with some options, but I ain't looking it up.
- Looking at 2019 Ford dually f350. I would be towing occasionally but carrying a 5500 lbs truck camper
- Gas or diesel and towing what?
- Since you are looking at a 4.10, you are looking at a dually. I have 4.10 in mine, very happy. I am pulling right at 16K and live in the mountains of east TN. The 4.10 keeps you in the right spot on the RPM's when towing. Has good get up when pulling on interstate. Milage when towing is 9-10 and 16 unloaded. You only other option with a dually is 3.55's. From what I have read there isn't a big difference in milage between the two.
