A new Vibration

do those still have air bags on the front of those trucks? they used too. my usxpress truck had a bad vibration and it was my front air bag .

 

but it was reported as more of a violent shake than a vibration

 

I had a vibration a couple of months ago in my 07 780 Volvo. It turned out to be the rear airbags were set too high. I had them adjusted at the Volvo dealer and that was what fixed the problem. It drove me crazy trying to figure out what was causing the vibration. It would only happen when going 65mph or higher and would not do it all the time.

 

When I came to a stop then move again. My truck and the trailer rock a little when I get starting moving again. I can feel it I think why it rocks a little when you press on the gas because the road, and the weight of your truck and also the trailer that is attach to your truck.

 

Not sure how to ask a question so going to do it here see what happens
I’ve got a 1992 377 and have a driver telling me Truck vibrates at times unusually first part of day at different speeds most times going up hills but will happen even on flat roads but as the day goes prettty much stops I’ve had Truck at Peterbilt shop had a complete tune up service ect was told all looked good bran new drivers ect guess I’ll be taking it back to them looks like from all I’ve read a lot of people have this happening to them and a thousand reasons for it just worried it may be a motor issue any thoughts from you out there