VEECON

I have a '10 Screw F150 4x4 and am experiencing a troubling issue. I have quite a bit of knowledge when it comes to performance suspensions for cars but don't have much experience at all with trucks.

The issue I am experiencing is that when I'm driving down the road and hit a few bumps, the rear end gets loose and gets a bit sideways at times. The issue is worse when traveling at highway speeds (75+mph) and at the point it's almost scary as the truck gets out of control. The mods I have on the truck are autospring 1.5" level with 305/55/20 nitto trail grappler tires and aftermarket wheels.

At first, I was thinking that it has to be the tires due to them being heavy and a mud terrain type. I was going to replace them with all terrains to gain a better ride quality, fuel economy, and hopefully fix the stability issue. I am not sure if this would be a fix and thought to maybe remove the level and tire/wheels and go with a street set up with all season tires. My final solution was that maybe the Roadmaster Suspension could be the answer. Right now I just don't have a clue what to do and wanted to see if anyone else experiences this or if someone has a definite answer for a solution. Appreciate your help.

greyboosted

Have u tried reducing the air pressure in the rear tires....

VEECON

I originally had them at 40psi, then changed them to 45psi after doing research and finding that is what's recommended. Both levels I experienced the same thing and I don't think it is advisable to go below 40psi. I also think the lower psi resulted in lower fuel economy as well.

Vancouverite

At least it's not as bad as the tundra...

Fmartinez22

It's not the tires I got the same on a 06 lariat n also lifted maybe it's the lift or check the u bolts sometimes they not tight enough

NastyFFX4

iTrader: (1)

Is this happening on a particular road?

packplantpath

Im gonna get out on a limb here and say it is because you bought a truck and are used to performance cars. Trucks corner like crap. Slow down and i bet you never notice.

But you could have something legitimately wrong too.

frunko1

iTrader: (1)

I swear that is tanner foust (top gear) in that video.

NastyFFX4

iTrader: (1)

It is.

ianinedm

Thats a crazy video. I can't believe how much flex that Tundra has in the rear. That thing is twisting all over the place.