Waggle not sway....

Bayoubass wrote:
I have Michelim LTX A/S tires on my 150.

Tires can make or break a tow rig. Are these P or LT tires?

And what tire pressure are you running front and rear in the truck?

A tire pressure experiment is in order. Michelin ranks up there with about the softest sidewalls of any tire brand. In P or LT tires. That is part of how they ride so well none towing, but for towing a camper, that softness is a negative.

Suggest this. Look at the tire sidewall max cold air pressure. That is the max you can air up. On the front, you want the highest air pressure up to max cold side wall, it can take until you get a hard bounce that seems to shift the truck left to right. If you do not get this bounce, then great. If you reach that bounce limit, then air down 5 psi and try again. On the rear, go to the max to start with.

I had a set of the older LTX M & S LT E load range that changed a very stable 3/4 ton truck and turned it into a waggler.... I wore out the OEM tires and had to change tires. So I went the premium route with the LTX. Bad move... On the LTX, I found that there was a global shift in stability when going from 50 psi on the front (door sticker) to 60 psi. Then kept up'ing the pressure 65, then 70psi. at 70, the front of the K2500 Suburban would literally bounce left or right going over a hard bump. I found the high end edge of that tire and the weights of the truck to the pressure I could run. Back it down to 65psi and that was all I could do short of changing tires again. The back was already at 80psi also door sticker.

I'm assuming you have P tires, and they are even softer than LT. Even if you go to LT, you have to run the LTX at higher pressure to get the stiffness.

You can air down the tires down to normal door sticker when not towing. Yes I know, a pain to air up and down, but it beats the waggle.

If you want to "feel" the difference, go to the back of the truck, lean into the truck bed and get the truck rocking with side wiggle. Look at the side walls and rim on the front and rear tire. The tire is planted to the ground but the side wall is flexing and the truck a wagggl'ing. After you air up, try the wiggle test again. You can feel the difference.

Good luck and hop this helps.

John

PS. For sure know your TT tongue weight and get it up in the 13 % of loaded GVW of the TT. You need to do this regardless or any other fix. And level out the camper. That nose high on some rigs will create instability.