This past sat. I took a rode trip and the average speed limit was 70-75 well while driving. I notice once I got up to about 70-72mph I started getting a pretty heavy vibration but once I got to about 80 it went a away or minimized but still felt a little... What could cause this all tires or new . I Was thinking that they may be need to be reblanced or realigned. I know I hit at Few hards dips In. The roads saturday that may have thrown the alignment or tires of balanced or something. Any help

 

Take the driveshaft out an have someone pull you 70-80 and see if the tires are the issue. If they dont vibrate then its your driveshaft/pinion angle causing issues



*i just hope a newbie doesnt try the 1st part bc he read it on the internet*

 

I don't think it's the able or shaft cause that was taken care of when I first lowered the truck .. it just started this after I had to get a new tire last week.

 

Knot in a tire possibly

 

I'll check and see

 

Get your wheels re-balanced and checked for road force. Chances are you have a tire with a bad spot in it that weights wont correct for. Seen it plenty of times on brand new tires while working at the local chevy dealer.