Help Vibration During Acceleration

[MBofTexas]

I have a 2014 1500 Express with 5.7 Hemi. I have 6" lift done by Regency hear in the DFW area. The wotk was done for the dealer prior to my purchase. My truck was purchased new last month. I have BF Goodrich All Terrains KO. 325'S Which I believe are equivalent to 35's give or take. When I push the gas with mild to high accerlation I feel what I would call a vibration through the gas pedal. I spoke with Matt at Moe's and he has a similiar issue. Any thoughts or ideas? Thanks

 

[jwheeler]

I would take it to the dealer. But if you want to try and figure it out, I would inspect the front CV angles. Too steep of an angle can cause a vibration like that. Or the pinion angles. Is there no vibration at steady speed or light acceleration?

 

[MBofTexas]

No vibration at steady speeds and slow accelerations.


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[RamWrayzor]

What brand of lift is it? RCX?

 

[MBofTexas]

Pro Comp


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[RamWrayzor]

Is there a spacer on top of the rear spring? The reason I ask is the most complaining comes from lifts that place the big spacer on top of the spring, especially during acceleration.

 

[Doc1609]

I could feel a slight vibration in the gas and brake pedal when I was running Nitto Trail Grapplers. It felt like something wasn't right, but it was just the lugs of the tires. Not sure you'd have those issues with an all terrain.

 

[Johnn123]

^I got the same thing when I switched to my MTZ's. Never noticed it with AT's though.

OP get a pic of the cv angles and the pinion angles and post them for us. I have also heard the top coil spring spacers can cause a vibration on acceleration. Is that how yours are installed?