Vibration question

My truck rode perfect with no issues stock. The dealer in installed a 2.5 in level in front and I installed an aal in the back to give the truck a little take back. The truck still rode great with the stock wheels and tires. I decided to put some methods with 266/75/16 fallen wild peaks. I started having vibrations at various speeds low and high. The wheel does not shake, it is more of a hopping feeling at highway speeds and at very slow speeds (under 5 mph) there is a rotating vibration in the steering wheel. I actually work as a tire guy so I have roadforced them multiple times with no help. The vibe does not go away in 4 high. I am convinced that the falkens are garbage.

 

If you did a 2.5" lift, you need the axle bushing. Every spacer lift does this.

 

I am told that if it is the needle bearing it will go away in 4 high, which it does not

 

I don't think bearing

What PSI do you run?

 

35, they are not the e rated version

 

Add some air and see if that helps, 40-45 psi.

I'm not a fan of Falkens but it shouldn't be too terrible.

If steering doesn't vibrate/shake, then I'm thinking it's gotta be the lugs and contact with the ground causing an less than preferred feel

Are you able to go back to stock wheels/tires to test?

 

I unfortunately no longer have the stock wheels, I’ll try the higher psi and loosen the lugs and torque to spec

 

You may need a front diff and rear carrier bearing drop kits to get everything back in spec. Don't raise the air pressure, lower it to 30 cold.

 

His vibration started after the tire/wheel swap, that's why I was taking that variable out for the bearing.

Usually if I lower the pressure it gets a little more vibration on my tires.

OP for sure play with the air PSI tho

 

Lower them to 28-29 psi. That eliminated a lot of vibrations for me after a lift (I'm on C-rated Goodyear Duratracs). Sometimes the stiffer suspension and the tire's stiffer sidewalls cause a resonance issue.

 

He gained some height with the new tires which can cause some vibrations in the driveline.

 

For a 116SL, you should be at 27 psi.

I believe Methods are 108mm centerbore; do you have hubcentric ring spacers?

 

I did install the ome Carrier bearing drop, I was going to try put it back to stock to see if that changes anything, I think having a dclb makes it different then the more common dcsb

 

I do have the 108 to 106 rings

 

I did it to both my longbed and sons short bed.