Cause of vibration

Thought about starting a thread about vibrations. Everyone has them or had them at some time.


You can list the type of vibration you had and the cause of it. Say if it was RPM related or SPEED related or both.

Example. Worn cupped or flat spot tire that would be speed related correct or warped drive shaft would be RPM related.

Also if you feel like explain how you found the cause if the vibration. Hope this thread helps some learn or even solve some current vibration issues.

 

I got the KW 8 back suspension with the small air lines still haven't updated to the bigger air lines. Anyone have a part number for this. I think it's a kw part number and they sell this kit.

Sometimes I get a weird vibration and it feels speed related not rpm related. It's between 50-70 after 75 it feels smooth again. It's not always vibrating between those speeds its on and of. Sometimes it stay on for a while bu then when I try to repeat it to show someone and get second options what to look over since this thing I went over it with a few other from top to bottom.

i am told by many that's the way it is and just gotta live with it. I will not understand and accept this since this was not happening since purchase of truck. I'm second owner and it started doing this about 150k ago and I beep trying to figure out why. Checking tolerances and changing worn parts but their was few that needed to be replaced or changed.


Or point me to a reputable shop to check drive line angle since I don't have the tool to do this. Also I asked a few KW dealers the correct air bag height and they all have me different measurements. From center of axel to bottom of frame.

truck is a 2000 kw t600 last six yf845484.

 

Ride height I know but driveline angles.

I don't have a big enough protractor

 

Motor mounts where changed during overhaul. Thank yous for ideas and help. Gonna try and figure this out. Have a thread on this in the KW section also.

Thanks everyone.