truck squat question

[gwilkrrs]

I have a leveled 2017 f350 cclb. with the rv hooked the truck sags maybe 2"
I think the trailer is a bit nose low also- (I need to hook and measure on a level surface to document)
I am contemplating adding a taller rear block to add some rake back into the truck or air bags, but I have no history of bags. if I choose bags will the ride be harsher when aired up to level? the truck has a 3" block and I can add a 4" or 5" block easily......

[Northofu1]

Honestly, I would look into Bilstein 5100 shocks in the rear to start, it's the cheapest way to start and ride will improve and significantly reduce raking. If you feel you need more, you can't go wrong with ride rite 5000 with 3 convenience options.
Good luck sir.
P. S. If the rear bilstein's work out to your liking, add the fronts, they are pricier as the install is more and an alignment is called for.

[gwilkrrs]

bilstein's were added prior to this, greatly helped the ride compared to the stock rancho shocks-
i am looking into the air bags to support but wonder if that stiffens things up when loaded and aired up-

[Northofu1]

Oh yes, I had them on my 1/2 ton. They worked very well.
Ride will only be harsh if trailer isn't hitched when aired up.

[BrooksFam]

I have air bags on my Ram and when aired up and truck loaded the ride is still good. If over aired, I guess the ride could be harsher. With no load, I put 10psi in them and it doesn't affect the ride. I have a 4" leveling lift. I also have a WDH for my TT.

I pulled my #6000 loaded enclosed trailer from Oregon to S. Carolina. I had 40psi in the bags and it road great. Getting ready to do it again, only from SC to Oregon.

I've had air bags on several tow vehicles over the years and like them a lot for leveling things out.

[JRTJH]

Originally Posted by gwilkrrs

I have a leveled 2017 f350 cclb. with the rv hooked the truck sags maybe 2"
I think the trailer is a bit nose low also- (I need to hook and measure on a level surface to document)
I am contemplating adding a taller rear block to add some rake back into the truck or air bags, but I have no history of bags. if I choose bags will the ride be harsher when aired up to level? the truck has a 3" block and I can add a 4" or 5" block easily......

Note the part in red: Are you saying that you have modified your truck suspension to lower the rear or raise the front suspension so the truck "sits level with no load" ???? If so, that 2" sag is "lost with the front lift kit".....

Ford builds their trucks with a 2" (in most cases) lift on the rear axle so that when the truck is loaded, it "sits level"...

My reason for asking: If you've modified your truck with a "leveling kit" that may be the source of your current problem......

[gwilkrrs]

yes the truck had the front end raised to level the truck.
I realize this is why the truck squats now
I like where the front end is now and am wondering if I should use a taller rear block or air bags to help with the truck sagging.

[BrooksFam]

Air bags will give you the added support when you want it and none when you don't.

WDH adjustment may help a bit, but I would add bags before larger spacer blocks, but that's just me.

[Ken / Claudia]

Just me, since the trucks are made to carry a load and be level. There for have the rear higher when empty. I would not be fighting with raising or lower anything part to suit what I like or think is looking better. As this story points out raising the front to look cool cost money, parts and changed the way the truck will look when loaded. Now more money and parts needed to raise the back.
Function is what I want, not what may be cool looking or look better. Lots of money to be made by selling and installing aftermarket add on's that just serve to change looks. Where I lived in Oregon some sales lots only sold cars and trucks with all types of changes to their looks. They always had the younger guys checking them out. But it's their money not mine, so they like it and are willing to pay extra, so be it. As a traffic cop some of those changes get attention and tickets, boy have many be mad when they spent money on a truck/car with illegal changes that looked good.

[razor 68]

I have air lift bags and they work good as long as you find the correct pressure. too much air and you will lose a tooth filling. the bags are inexpensive- the compressor is the expensive part. my lines t at my bumper and I have a portable 12v compressor. I put a 12v plug on the side of my campers battery box since it is the only time I need to pump them up any. I run 30lbs loaded and drop to 15lbs empty. tried 50lbs at first and stopped 5 miles down the road to let some out. did that a couple times and settled on 30lbs. every rig will be different.

[JRTJH]

Originally Posted by gwilkrrs

yes the truck had the front end raised to level the truck.
I realize this is why the truck squats now
I like where the front end is now and am wondering if I should use a taller rear block or air bags to help with the truck sagging.

OK, let's start at step 1: The truck sat 2" high in the rear originally, you added 2" lift to the front so the truck sat level. Now you're considering a 4" lift to the rear so the truck will sit level when you hitch the trailer.... Won't that put your front end 2" lower then the rear "again" ?????? That's sort of like the "dog chasing his tail"....

Eventually, you're going to need to raise the trailer to match the truck if you keep adding lift kits..... That is, if you haven't already exceeded the "optimal truck/trailer attitude (when hitched).....

[ChuckS]

Personally Id remove the front end lift or if the front height torsion bars were adjusted to level truck Id return to stock config... The GMC will sit with a nose low back high unloaded... Id then also add a set or Airlift 5000s ... they arent airbags... quality gear and then if you have a bit of sag compensate with air pressure... I wouldnt own a truck without airlift 5000s

every turn on the torsion bars is 1/8 inch change in front end height

[BrooksFam]

Originally Posted by ChuckS

……...... Id then also add a set or Airlift 5000s ... they arent airbags...…...

I'm confused, they look like air bags, or at least my perception of them. I thought air bags and air springs were synonymous.

https://www.etrailer.com/Vehicle-Sus...t/AL57204.html

[ChuckS]

Typical "Airbags"......

https://www.sdtrucksprings.com/index...SABEgJof_D_BwE

Airlift 5000 series... not even in the same class ... in my opinion...

https://www.etrailer.com/Vehicle-Sus...t/AL88385.html

[Northofu1]

*** After further review, I would investigate the 4600 model of Bilstein's as they are an upgrade from the oem brand. 5100's are for lifted or offroad applications.
That said, I would definitely take John's advice, and then remove the lift kit and see where you're at hitched before adding anything. if you're still squatting, then the Air Lift's are the way to go.

[tech740]

if you are looking to keep the front leveling kit in and make it level while towing you will need air suspension of some sort. Like mentioned above if you add a larger block in the rear you will have the original rake back. I assume you would only do this because the tires that are on the truck are larger than stock and the front leveling kit is required for them to fit appropriately.

[BrooksFam]

I'm with the OP about a leveled truck, I like the look when unloaded which is 90% of the time for me. That's why I have air springs for towing or hauling when I need a little rear end lift.

[GMcKenzie]

Originally Posted by Northofu1

*** After further review, I would investigate the 4600 model of Bilstein's as they are an upgrade from the oem brand. 5100's are for lifted or offroad applications.
That said, I would definitely take John's advice, and then remove the lift kit and see where you're at hitched before adding anything. if you're still squatting, then the Air Lift's are the way to go.

You can use the 5100's for a truck with no lift. Depending on where you get them, they may be cheaper and easier to get than the 4600's. You just need to keep the fronts at the stock setting.

I'm thinking of getting a set of 5100's and picking the front end up just a little (first notch above stock). Mostly because my air dam grinds on the walkway at work where I park. The little bit would stop that.

Plus I just think the 5100's look better.

[Northofu1]

After watching videos on the differences, I would go with the 4600's on my truck. It definitely doesn't need raising. The 5100s did make the ride alot nicer on the 1500.

[tomd]

Originally Posted by gwilkrrs

I have a leveled 2017 f350 cclb. with the rv hooked the truck sags maybe 2"
I think the trailer is a bit nose low also- (I need to hook and measure on a level surface to document)
I am contemplating adding a taller rear block to add some rake back into the truck or air bags, but I have no history of bags. if I choose bags will the ride be harsher when aired up to level? the truck has a 3" block and I can add a 4" or 5" block easily......

I have nearly the same trailer,truck. I adjusted the hitch side and with stock front end nearly level. Nose 1/2 inch high if that. Truck is nose down if not loaded, designed to sag the 2” or so. I’d remove front blocks.