3.55 vs 4.10

[Bebo]

Thanks for the input on output.....doing some searching looks like ford must be putting 4.10 in a large portion of their 350s with dually.....shall see what the dealer can find....i guess in the big picture for my use both will do the job properly with no big downside to either other than a slight change to fuel economy....which really answers my question. Just looking forward to having a proper set up.

[Javi]

Okay... here's the deal...


As John said.. I went from a '12 F250 with 3:55's to a '15 F350 DRW and 3:73's..

Not enough difference in fuel mileage to worry about unless you are robbing the grandkid's piggybanks to buy fuel..

Duallys get less MPG period... it ain't about gears it's about drag... two more tires on the ground= more drag... Fenders sticking out 2 feet on either side.. = more drag..

Best MPG with the '12 F250 (hand calculated) 19.6 Average towing the 333 MKS... 9.5

Best mileage with the F350... 18.2 (again hand calculated) Average towing the 333 MKS 9.5...


Now... here's the REAL DEAL...

The 3:55's vs 4:10's ain't about MPG, torque, HP or butt warmers... it's about tire diameter and final drive ratio... All of them got the same drive ratios in the tranny.. Look at the TIRE DIAMETER vs rear end ratio

Me.... I'd go with the 4:10's and never look back.. but you won't catch me EVER buying an Aluminum pickup...

Or anything more than an XL or XLT... more than that is just a waste of money.... I love vinyl floor mats, wash 'em out with a water hose.. don't need power seats, ain't nobody but me driving it..

The only gewgaw I like is hands free phone..


One more...

Going from a SRW to a DRW pulling a 12.3K trailer is NIGHT & DAY.... Them folks that advocate the F350 SRW are full of it.. And "IT" ain't ribeye...

[larry337]

Originally Posted by Bebo

Thanks for the input on output.....doing some searching looks like ford must be putting 4.10 in a large portion of their 350s with dually.....shall see what the dealer can find....i guess in the big picture for my use both will do the job properly with no big downside to either other than a slight change to fuel economy....which really answers my question. Just looking forward to having a proper set up.

As I said most would prefer the 4.10 because bigger is always better even though its not needed. That's why most of the ones in stock have the 4.10 and that's why it would have better resale. My last truck was a 6.7 with 3.73 gears, this one has 3.55, and you can't tell the difference. And as Javi pointed out your tire size will change the final drive anyway. My 3.55 has 34.5 inch tires and a dually has probably 31-32 inch tires so your effective ratio is higher than mine. 4.10 is overkill but you'll love either truck. So much power and a 6 speed trans where the top 2 gears are both overdrives. These are nothing like the trucks from 20 years ago.

Sent from my SM-G920V using Tapatalk

[gearhead]

I've pulled our Montana HC with a F350 with 3.55 and the current Ram with 3.42. Can't tell any difference. These new diesels produce so much torque you don't need a high ratio rear end. Might have to lock out 6th gear in the hills but that's no big deal. Get the 3.55 and enjoy a bit less noise and a bit more MPG unloaded.

[captcolour]

My 2017 F350 dually has the 3.55. No problem with the Alpine at probably 14K. Truck doesn't know the 5er is back there, even in the mountains of Colorado this summer. I ordered my truck and chose the 3.55 to hopefully maximize mpg when not towing.

[ADQ K9]

I ordered mine. Theory was if I am spending that kind of money I will get exactly what I want.
I specd the 3.55 ratio I was building a tow vehicle and a SRW. Was not planning for a 5er but got the 5thwl/goose neck prep package to stiffen up the rear end. At the time camper package was not available with the FX4 so no rear sway bar. I only have a 3200# pay load but it is more than enough for my needs. I can haul 2 ATV's on my Diamond Back bed cover, hook up the Tumble Weed and still be within my GVW and GCW. The main thing for me is that my truck still fits in the garage. The Tumble Weed only has a GVW of 8800#:

[Bebo]

250 short bed fits the garage....the 350 dually longbed wont - for now....time to think about the polebarn and workshop to store the 5er and truck. Gonna inquire about lefover 2017s with 3.55 equipped they way I want, but don't think gonna sweat it if now available and just go for the 4.10. I don't think noise will be an issue, heck I tow frequently with a window down on TV and my 250 has no significant noise. When not traveling is only gonna be driven a few times a week so not too worried about that.

[ADQ K9]

Bebo,
Just thought you might think of the ordering option if you have the time. ordered mine the day after Thanksgiving and took delivery of it on FEB 12.
I don't drive mine much either, I commute back and forth to work on a Boeing 737

[Bebo]

Well, did a check for a left over 2017 with what I want....in the right price range....stuck with 4.10 gearing....could not beat the price/deal....happy with decision and have room to grow trailer wise should we choose down the road. Appreciate everyone's input on gearing, thanks

[Javi]

Originally Posted by Bebo

Well, did a check for a left over 2017 with what I want....in the right price range....stuck with 4.10 gearing....could not beat the price/deal....happy with decision and have room to grow trailer wise should we choose down the road. Appreciate everyone's input on gearing, thanks

Welcome to the dually club...

Javi

[Bebo]

Now just gotta get a new hitch and we are in business.....that will be next post of questioning....recs on 5th wheel hitches.....will start a different string on that after I read up on other strings

[JRTJH]

Congratulations on the new truck. You're going to enjoy it regardless of the gear ratio !!! As for the hitch, does your truck have the Ford "puck system" ??

[Bebo]

It does.....thinking about the B&W RVK3300 system....seems to have high ratings from what I can tell so far

[travelin texans]

B&W would be my 1st, 2nd, & 3rd choice.

[Bebo]

Travelin.....you just don't sound very convincing, B&W only your top 3 choices.....sounds like ya have some doubt there.

Thanks for the strong confirmation on my initial thought

[Javi]

If I hadn't found a buddy with a brand new Reese/Ford Elite hitch that he didn't want or need for $250 in trade... I would have bought the B&W Companion for the Ford puck system.. No question

[E Rod]

Originally Posted by JRTJH

Bebo,

Hopefully Javi will chime in before long. He owned a diesel F205 and upgraded to a F350 dually diesel in 2015. Granted the 2017 is a bit different (lighter overall with more HP/torque) so it would be more capable than his 2015. I don't know which gear ratio he has, but he's towing a 12-13K trailer, so he can tell you from experience the differences in towing capability between the F250 and the F350 dually. I think that's your biggest question at this point, if I understand your posts.... He'll be able to give you some "sage" advice.....

Hello all . I tow a 2017 40' Alpine with 6 slideouts. Dry weight 13560 and tow it with a 2016 F350 SRW long bed, 4x4 ,3.55 axle ,6.7 power stroke. It pulls and handles very well. Truck doesn't seem to feel the weight back there as I manage to enter the interstate or climb mountains without any problems.

[pawpaw]

Very happy with my '17 F-350 DRW with the 4.10's. I pull a 371 Fuzion that grosses out at 16K pounds. Used my son in laws F-250 for 2 yrs to pull it but the 3050# pin weight was exceeding the 250's payload by too much for me. Like putting a tandem load on a single axle highway tractor in trucking terminology!! Before I broke an axle or blew a tire I bought the 350 almost a year ago and couldn't be happier. It's my daily driver also and getting 14-15 in town and 16-17 hwy at the posted limits. Not that far off from what I was getting in my '13 F-150 Ecoboost I traded in. With the 4.10's I'm in 6th @38 mph plus the truck accelerates easily and smoothly. Took a 2,300 mile round trip for Christmas and averaged 16.3 mpg so that's not bad in my book with the truck loaded down the whole time.

[Bebo]

Well, so far am happy with my f350 crewcab dually Lariat ...awaiting to get that first couple thousand miles on it before pulling our 5er. Just got a new B&W hitch for the ford puck system and getting use to the extra width of the training wheels. Something we are gonna do that never did with our 250 is visit the scales once all loaded and see where we really are weight wise.

[pawpaw]

Originally Posted by Bebo

Well, so far am happy with my f350 crewcab dually Lariat ...awaiting to get that first couple thousand miles on it before pulling out 5er

Congrats...waited a thousand with mine and no trouble. Have 11K in a little less then a year and it sits under my carport a lot!! Hope you enjoy yours as much as I like mine.