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Old 05-18-2022, 05:33 PM   #1
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5er with lifted TV?

This has probably been asked but I wasn't able to find anything searching.

I have a loaded F-350 CCLB 6.7L PS on order that may get built someday. I'd like to have it lifted 2.5-3 inches and put 35s (properly load rated) on the stock 20" wheels. Then we'll be looking at smaller 5ers at 10k GVWR or less and a Reese Goosebox hitch.

Would this be a reasonable setup? I know stock would be best but I wonder if this would still be comfortably safe?

Thanks
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Old 05-18-2022, 05:43 PM   #2
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Bad idea , all of the new trucks sit to high and you have to run low hitch heights to keep the trailer level. Most new truck end up with less then 7" of bed rail clearance to the bottom side of the trailer , when the trailer sits lower then the truck like when your backing into a driveway down hill you will tear up the truck bed and the trailer if your not really careful! 35" tires kill the gear ratio for pulling heavy , something else to think of is the heat the trans will see when towing because of large tires.

About the only option with lifted trucks is put a hauler bed on the truck to gain back the clearance.
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Old 05-18-2022, 09:13 PM   #3
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Or lift the trailer
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Old 05-19-2022, 05:17 AM   #4
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Quote:
Originally Posted by Squantobon View Post
This has probably been asked but I wasn't able to find anything searching.

I have a loaded F-350 CCLB 6.7L PS on order that may get built someday. I'd like to have it lifted 2.5-3 inches and put 35s (properly load rated) on the stock 20" wheels. Then we'll be looking at smaller 5ers at 10k GVWR or less and a Reese Goosebox hitch.

Would this be a reasonable setup? I know stock would be best but I wonder if this would still be comfortably safe?

Thanks
Not likely, no... My 2500 Ram came with 35" tires on it (no lift) and I couldn't even get under my fifth wheel. I had to remove those and put the stock size tires back on. I didn't even try it with my 3500.

As some have already said, the newer trucks already sit high. At stock ride height I can get exactly 6" of bed clearance with my 3500 with the trailer level. No more. Adding any taller tire would require me to raise the pin box up to bring down the nose of the trailer and further reduce my bed clearance.

My suggestion... if you want a lifted truck, get a travel trailer or lift a different truck as a toy and leave your tow vehicle stock. I don't recommend lifting the trailer unless you have no choice with the stock truck, as it raises the center of gravity and makes it more prone to tipping. You'll thank us all later.
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Old 05-19-2022, 05:30 AM   #5
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Why do you want to lift the truck?
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Old 05-19-2022, 07:19 AM   #6
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Typically lifted trucks don't tow as well as non lifted trucks. They have more difficulty controlling the 5th wheel. Center of gravity is higher is probably the reason.

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Old 05-19-2022, 08:24 AM   #7
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Not going into the good or bad about lifting a truck but I will point out that those lower GVWR 5th wheels generally have a lower front over hang vs full profile. In stock form some F250-350 owners have issue with the 5th wheel ending up front high. I would check into the 5th wheel you want and see what you're up against 1st.
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Old 05-20-2022, 08:00 AM   #8
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You will need a TT. As has been said the 5’er won’t clear the bed when I’m off camber situations suck as driveways.

Even though you are looking at lighter 5th wheels the bigger tires will raise the gear ratio and performance will drop along with the potential for the trans to run hot.
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Old 05-20-2022, 02:51 PM   #9
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You will need a TT. As has been said the 5’er won’t clear the bed when I’m off camber situations suck as driveways.

Even though you are looking at lighter 5th wheels the bigger tires will raise the gear ratio and performance will drop along with the potential for the trans to run hot.
Not necessarily true.
Running 35" tires with 3.55 gears actually turns higher rpms than OEM 20" tires with 3.31 gears.
If the OP ordered the 3.55 gears and runs 35" tires he will have more tow rating than the 3.31 gears and OEM 20" tires.

But Ford has the same tow rating for the 3.31 or 3.55 regardless or tire size. (18" vs 20". So the only hang up would be 3.31 with 35" tires but the rpm difference is minimal at best.
It's only 35 rpm's different between 34.1 and 35" with 3.31 gears.
If he ordered 3.55's IMO he's golden with 35's.
OP's only towing 10,000 lbs or so so roughly 1/2 of the max tow.

Somewhere in all that the OP should be fine with 35's.
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Old 05-21-2022, 10:35 AM   #10
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The bedrails on your truck stock will be 60 1/2" high; add your lift to that. Many of the 10K or less trailers were designed for half ton trucks so lower front overhangs. If buying new, you could maybe find a trailer to fit the truck without alterations. Buying an older fifth wheel might be problematic; I know my trailer would never fit your truck even when stock.

I suggest you do some trailer shopping with a tape measure before you buy the tires. I'm thinking the truck will be fine from a perfomance perspective, just not from a fit standpoint.
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Old 05-21-2022, 10:55 AM   #11
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Simple answer, get the truck, put the lift and macho tires on it. Then buy a lower profile 5th wheel stock height about 12' 6", then have a sub frame built to raise it high enough to tow level, just don't go over 13' 6" in 5th wheel height.
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Old 05-21-2022, 11:16 AM   #12
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Once the suspension is modified , you can throw all your new truck's tow ratings out the window and most likely any driveline warranty related to vibration ,handling and alignment .

Is this something you want to do with a $$$$ truck ?

I spent way to much time arguing with owners of modified trucks at a Chrysler , Dodge Dealership , who expected repairs ( related to vibration and handling ) under warranty ; and my answer was the same ;" talk to the shop that installed the lift kit / tires".
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Old 05-21-2022, 01:47 PM   #13
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Once the suspension is modified , you can throw all your new truck's tow ratings out the window and most likely any driveline warranty related to vibration ,handling and alignment .

Is this something you want to do with a $$$$ truck ?

I spent way to much time arguing with owners of modified trucks at a Chrysler , Dodge Dealership , who expected repairs ( related to vibration and handling ) under warranty ; and my answer was the same ;" talk to the shop that installed the lift kit / tires".
Not lately cause of shortages but in the past I've seen plenty of brand new HD trucks sitting on dealer lots with level kits and what looked like 35's.
How does warranty work come into play when a dealer has the whole thing installed prior to selling?
We have a Les Schwab and a Ford dealer down the road from us and in the past the two got together and did new tire upgrades.

20" OEM tires for the F350 are 34.1" OD. 35" are 35" 1/2 on top 1/2 on the botton. Truck would only raise up .45"
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Old 05-21-2022, 09:19 PM   #14
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If you are getting a truck for towing, why would you alter the suspension ?
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