What causes pedal and cab vibrations? Gets real bad around 70ish, the steering wheel doesn't vibrate by the way, all front end parts new and aligned today... Was doing it before and after... What could it be?

 

Bad U-Joints unbalanced driveshaft, unbalanced tires. Here is a good vibration chart.
https://dodgeforum.com/forum/1947777-post6.html

 

They balanced my tires, I had driveshaft rebuilt and balanced was doing before and after, and my u joint, I need help with it, during the time of before install they must of gave me like 10 u joints that were wrong in some sort of way, wrong cap or clip, managed to swap a couple caps to get it to work at the time, but I think there was alittle bit of play, not loose but the joint could be tightened a couple millimeters to the left or right with clip in place

 

According to the chart sounds like the u joint, but I tryed oriellys, Autozone, napa auto, everywhere and they kept giving me u joints that didn't work

 

Get a pair of calipers and correctly measure the caps. Then check websites to find the right one before you go to the stores.

What was wrong with the U-joints they gave you? To small or what?

 

They were all different everyone I tryed, like the one I finally got to fit wasn't a regular cross shape 2 arms were short and the other 2 were noticbly longer

 

By the way don't know what happened to stock u Joint so I'm kinda screwed on exact size