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Old 11-10-2019, 08:25 AM   #1
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Getting a new truck

I currently have a '17 F-150 5.0 with tow package but it just struggles in the hills of KY and MD. Looking at a 2019 F-250 diesel. My question is that there are quite a few different gear ratios available and I was wondering what might be the best for my situation. I have a Heritage Glen lite which has a dry weight of 7000lbs. I was trying to decide between the 3.31 and 3.55. The 3.31 are available with 17"/18" wheels and the 3.55 is normally available with the 20" wheels. Also it seems that I'd want the electronic locking axle versus the non limited slip. I appreciate your input.
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Old 11-10-2019, 09:16 AM   #2
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I depends upon the type truck cab you are looking at, regular, super or crew cab. If you are looking at a regular cab the towing capacity is the same for either the 3.31 or 3.55 axle. I am assuming that you are looking at a SRW configuration. But even the crew cab 4x4 has more towing capacity then you will need for your unit. As to the tire size I would go with the tire size that makes your towing unit more level. The 20 inch new trucks tend to be much higher off the ground than an older truck.
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Old 11-10-2019, 09:22 AM   #3
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I had a 2013 F150 5.0 and didnít like the way it pulled my trailer. Two years ago I traded it for a 2017 F250 diesel with 3.31 gear ratio but I think either of those ratios would be fine with your trailer. My trailer is 8000 lb loaded and I love the way the truck pulls it. Prior to purchasing the F250, I rented one from Enterprise Truck rentals for a day to make sure it would do the job. Just returned from 2 weeks in the mountains of Virginia and the new truck handled the task effortlessly. We call our truck ďThe BeastĒ.
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Old 11-10-2019, 09:32 AM   #4
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Consider any of the F250 gassers ?
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Old 11-10-2019, 10:07 AM   #5
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If you want a diesel buy one but any 3/4 ton gas truck will pull your unit with ease.
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Old 11-10-2019, 10:27 AM   #6
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I totally agree with other posts that you don't need a diesel. You may want one however . . .

IF you buy a diesel, don't get an F250 as the diesel engine eats up the payload. Go F350.

An F250 gasser has plenty of payload. If you are patient, order a 6.2 with the 4.30 gear set.
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Old 11-10-2019, 10:31 AM   #7
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getting a new truck

Thanks for all the input. I'll be getting a super crew. I did look at the gassers, but the torque is very similar to the 5.0 and I've been told that you'll still get the downshifts that I'm currently experiencing. My truck downshifted to 3rd gear so I was at 4500 rpm doing about 45mph. Very noisy in the cab at those levels.
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Old 11-10-2019, 10:48 AM   #8
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Is this truck going to be used primarily for towing or will it also be your daily driver? If it's the latter, I'd go for the taller gears because they tend to have better gas mileage and are a little easier on the engine at freeway speeds. An F-250 oil burner is plenty of truck for what you're pulling, but if that's what the truck will primarily be used for and you're packing lots of stuff, maybe the shorter gears would be best.
Just as an aside, have you considered an F-150 with the "big" EcoBoost engine? I'm in the market for one now and from what I've been hearing that thing is built to tow.
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Old 11-10-2019, 11:33 AM   #9
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I reckon the larger diameter 20" wheel is why the 3.55 gears are needed with it.
Don't forget the cost for replacement 20" tires is higher.
I would have no problem with the 3.31 gears/18" tires with the trailer you have.
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Old 11-10-2019, 04:44 PM   #10
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getting a new truck

Thanks for all the great information. I'll let you know how it works out.
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Old 11-10-2019, 05:03 PM   #11
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You say your trailer has a "dry" weight of 7000lbs.
Is that from the trailer's factory UVW weight sticker or from the fantasy brochure/website?
What's the trailer's model Number and GVWR?
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Old 11-10-2019, 05:11 PM   #12
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We have an f250 diesel xlt ext cab with FEW options and have a payload of 2464#. If you get a crew cab, you can take 200# off this, options will take a substantial amount off payload also. It is just two of us and two small dogs and our 5er is about 9300# loaded. We only have a cushion of 200-300# for payload. If I had it to do again, I would have gotten a 350 and not worry about payload at all
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Old 11-10-2019, 05:45 PM   #13
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3.55. I have 3.42 and wish I had the 3.73 that’s available now (it wasn’t at the time).
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Old 11-10-2019, 06:12 PM   #14
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We own a 2019 F250 6.2L SCLB, the truck tows beautiful (our trailer is only 5k lb loaded).
All I can say is there is no comparison from the 5.0 in the F150 to the actual power and performance the 6.2 has, the 6.2 is far superior all the way around.
We only use this vehicle for towing and couldnít be happier, in saying that, if this was my daily driver I would hate it.
The ride quality in a HD truck is horrible compared to the soft squishy suspension of half tons. Sure the macho men will say itís no big deal and to toughen up but when your job requires you to be on the road all day you will be begging for a better riding vehicle.
Also, fuel mileage is awful, but again not a big deal for us as we only use it for towing and expect poor mileage (gets 8-10 towing).
If you opt for a diesel get a 1-ton, if you can wait a little while longer I would see how the new 7.3l gas engine works out. This will be a great option to the diesel.
On a personal preference I like the Ford 6.2l gas engine, if I was shopping for a diesel in a HD truck the only one I would consider would be the Cummins.
I wouldnít take a power stroke diesel for free.
Just my opinion.
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Old 11-10-2019, 06:14 PM   #15
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Look at an F150 with the 3.5 Ecoboost. It's a torque monster.
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Old 11-10-2019, 06:31 PM   #16
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Quote:
Originally Posted by udflyer View Post
Thanks for all the great information. I'll let you know how it works out.
Go for the F 350, huge increase in CCC, like 1200 lbs. I bought a 250 then was able to trade for a F350 SuperCrew for minimal increase.

Ford makes the best trucks!!
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Old 11-10-2019, 06:47 PM   #17
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Quote:
Originally Posted by udflyer View Post
[...] there are quite a few different gear ratios available and I was wondering what might be the best for my situation. [...]
Quite a few different ratios? There are two: 3.31 and 3.55. Those are so close that there is almost no difference. You get just a whisker more fuel economy with the 3.31. You get just a whisker more grunt with the 3.55. Probably immeasurable in each case.

Go over to the Ford forum and you can read pages and pages and pages of people debating these two ratios. If you're a lift and 35-37" tire kind of guy, it's probably good to get the highest numerical gears.

Quote:
Originally Posted by udflyer View Post
[...] The 3.31 are available with 17"/18" wheels and the 3.55 is normally available with the 20" wheels. Also it seems that I'd want the electronic locking axle versus the non limited slip. [...]
Lots and lots and lots of rigs with 18" wheels and 3.55 axle (like mine), so it's not just a 20" wheel thing.

The e-locker is only for traction at lower speeds. At speeds greater than ~25 mph, the e-locker automatically disengages. So, that one is up to you. I like it for dirt road with washboard.

Quote:
Originally Posted by acadianbob View Post
[...] IF you buy a diesel, don't get an F250 as the diesel engine eats up the payload. Go F350. [...]
Winner, winner, chicken dinner.

There are some situations where going with an F-350 (Class 3) costs more to register, insure, and/or own. If those aren't in play, then paying the extra $40 for the F-350 is an easy decision to me.

But a 6.2L, a new 7.3L, and even a F-150 with the 3.5L EB would all probably tow as well as you need.
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Old 11-10-2019, 07:07 PM   #18
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Considering the weight you are towing, I would not get another half ton. There's more to the equation than HP, torque and mpg. 7000 lbs dry weight translates to 8000 lbs or more of total weight. You'll be much more comfortable with a 3/4 ton when towing that much weight.
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Old 11-10-2019, 07:12 PM   #19
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Towing

The diameter of both tire sizes are the same. Get the 3.55 gears. Per Ford there is not a difference in the weight you can tow. The 3.55 will get you to 60 MPH quicker especially w/ a trailer. After 10K miles in break-in, my 19' F-350 diesel is getting 21 mpg. on the highway @ 65. Pleased w/ power VS mileage. Pulling 8K V-front TT getting 13.5 or better.
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Old 11-11-2019, 07:02 AM   #20
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TT GVWR is 6999lbs. Model is T282RK. 3.55 gears sounds like the way I'll probably go. It's great being able to get all this information from you guys. Thanks again!
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