Truck Vibration

I have been experiencing intermittent vibration from the floor of my truck, the side mirrors shake, and at some instances it feels like the entire cabin is shaking. I do not feel any vibration in the steering wheel.
I have already got the driveshaft work done and replaced the steady bearing, got the wheel alignment and balancing done (twice). Took it to international, they did not find any thing wrong. I also got the ride height checked and it was slight high, so they adjusted it to spec and that did not fix the issue. Btw I also, replaced the torque rods (rear axle and one underneath the cabin), all shocks were also replaced very recently.

My hopes in posting this message here to see, if anyone else out there has experienced these symptoms and if they were able to find a cure for this problem.

 

Hi there,

The vibration usually occurs at anytime, meaning the speed and rpm does not matter. I have experienced at different rpms and speed all actors the board. I drive long haul flat deck and i experience it empty and when loaded. When there is no vibration, the truck just drives fine.

I have Cummins isx 15 550hp, the engine was rebuilt at 780k kms and now it has 1,155,000 kms.

I have got engine mounts checked and bell house mounts as well, there was nothing wrong with them.

I am not sure what to do at this point, as I have already spent thousands of dollars to get vibration fixed. Everytime, I take it to INTERNATIONAL they find it nothing wrong with it.

 

No, I am hearing about the “harmonic balancer” for the first time. Is it something that can cause such type of vibrations? Do you know if it is a costly repair?

 

It’s a 2017 International Lonestar