Floorboard Vibration

I have a 2008 Jeep Wrangler X - 2 Dr


Set up:

33" Duratracs
2.5" ome heavy duty coils
Ome steering stabilizer
Rancho 9000xl adj shocks
Teraflex front and rear trackbars
Synergy drag link
AEV geometry correction brackets


Problem:

I have been trying to figure out what is causing vibration coming from my floorboard for almost four months. It mainly happens when driving uphill at 40 - 65 mph.

I've had the following checked and have proven to be in perfect condition.

Carrier bearings - rear diff

Cv joint - no u-joints in an '08 JK

Tires / wheels

Wheel bearings

Ball joints



Have installed hub centric rings and lugs
I have non-centric wheels - 7069 pro comps.


I would really appreciate if you or anyone can shed some light on this.

Thanks!

When did the problem start? Right after the lift? Also have you tried removing the front driveshaft from the vehicle and re-driving it to see if the vibration goes away?

Is it an oscillating vibrations or a constant one? Is it more of a quiet buzzing sensation or is it quite audible as well?