410 gears
Cargo Master
Joined: Apr 2019
Posts: 2,799
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guessing your looking at a DRW f350 6.7. thats the only way to get 4.10s. deeper gears like the 4.10, generally reduce mpg vs higher gears like a 3.55. with the 10spd it may not be as noticeable
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Lead Driver
Joined: Nov 2005
Posts: 8,472
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It could use more fuel, but whether it is wasted or not is subjective.
The 4.10 gives it the ability to tow/haul more weight easier, so if you need that then the extra fuel isn't wasted.
The 4.10 gives it the ability to tow/haul more weight easier, so if you need that then the extra fuel isn't wasted.
Mountain Pass
Joined: Feb 2018
Posts: 130
Likes: 41
My 2017 F350 Dually had the 4.10 rear end. With it's 6 speed I saw about 13.8 mpg combined hwy/city fuel economy. My 2021 F450 has the 4.30 rear end and I'm seeing 15.5 mpg combined hwy/city economy. In my experience the 10 speed auto makes a big difference. If you need all the potential tow capacity of the truck then you want the 4.10.
Hotshot
Joined: Jun 2003
Posts: 12,347
Likes: 4,375
From: SW VA
Me personally, I much prefer the lower gears (higher number) for everything. The MPG difference is really a moot point….~1mpg or so
Cross-Country
Joined: Jul 2020
Posts: 92
Likes: 45
My 2021 F350 Dually cc 6.7 gets 16.5 mpg around town ,My 2020 F350 cc 6.7 got the same mpg around town .I have not run the 2021 dually for a long trip empty yet ,but I gust got back from a trip to the WV mountains with the 2021 dually with a 5200 lbs truck camper and got 13.8 mpg from north east Ohio to harpers ferry and to Black water falls lots of mountains . Ops the 2020 srw had 3.55s and the 2021 dually has 4.10s
Last edited by sweeperman; Aug 4, 2021 at 05:05 PM. Reason: brane fart
Laughing Gas
Joined: Jun 2021
Posts: 752
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Sweeperman, my condolences and gratitude. I appreciate and value the sacrifice your family has made.
