New pit 579 vibration

Hey guys. Desperately need some help. I bought new pit last year and after 75k mi I start having vibration...after 7 months fighting with the dealers I give up and trade it in...on my way home with new pit 579 I felt a little vibration (though I'm paranoid) Well, I didn't. 6k mi on a truck I experiencing the beginning stage of my previous truck vibration. When I'm accelerating in a lower gears my hood vibrate the most (a specially left side). When getting 70-75mph my hood, my dash, my sleeper ... little feeling in a chair, feeling in my floor, almost like some with my clutch...feels like a rotation vibration and it's on and off or sometimes vibration shifts from hood to bed to... on a high speed usually occurring when I lightly accelerating or slowing down...sometimes sounds like a helicopter.... was thinking maybe its not a driveline, maybe its my engine..but when truck start vibrating i put truck in nuetral it keeps vibrating. Did anyone experienced something like I do? This is 2nd truck...Rush truck center where I purchased the truck won't do anything to help + trying to milk money of me for every sec. They looking on a truck even though I just bought it from them....what a scam.

 

Brought it right back to the dealer, waiting on them to look on my drive line angles. After, thinking take driveshaft for runout

 

Yeah, it's been a nightmare...thinking quiting it all and start a new life.

 

Do you know good shops?

 

Been there the first time...Chad did my alignment and put centrametics in my rears...he said he does only alignments