Need advice: vibration Kenworth T680

My w900 and my classic both had vibrations when I bought them. freightliner had the drivelines way out of balance from the factory. The w900 was out of balance and one end had the yolk welded on out of time frome the factory.

 

Do you have an MX in there?

 

Had a vibration in my W9 a while back. Only had the vibration when loaded. After checking everything out, replacing u-joints and hanger bearing, checking ride height, I still had the vibration. It was driving me nuts. I was pulling a company trailer at the time, 48' flatbed spread. Bought a trailer of my own a few months ago. Vibration ended up being in the company trailer I was pulling. No vibrations at all since I unhooked from that trailer.

 

Check the shackle pins and bushings, as well... especially if one of your steers is wearing abnormally fast compared to the other. Been having a lot of them going out on the 680s lately.

 

sounds like a fuel injector problem,,maybe not firing right on all cylinders, Also could be a bad electronic fuel pedal..or maybe air leak around fuel filter

 

Mike, have you gotten to bottom of the problem yet? I seem to have the same problem, this week the dealer is gonna hook it up to some type of vibration detection equip.

 

Did you ever get this solved? I'm having the same problem with mine.

 

Subscribed. Mine is vibrating, but just under load at around 1200 rpm. Doing great above and below.