My passengers always feel it. Just used 4x4 and felt it on both sides. Not sure what to check. Thanks for any help

 

You'll need to do a lot of testing to isolate it - so much of the truck has something that spins.

Does it do it when you...

• accelerate/decelerate?
• go uphill/downhill?
• cruise? What speed(s)?
• turn left or right?
• are in gear/out of gear (while at speed)?
• lock/unlock both hubs?

Is it RPM-related (vibration at same RPM, but different gears)? Speed related (RPMs up or down have no effect)?