09 Peterbilt 386 front end bouncing between 55-60

Mines worse bobtail also. With a load you can still feel the bounce but its not teeth clattering.

I might end up going to dealer and having sensors put on the frame to find exactly where it’s coming from.

 

So I still have not figured out where the bounce/shake is coming from. No shake in the steering wheel just in pedals and shifter no pulling. I pushed in clutch and also put truck in neutral still bounced so not drive line related.

It bounced/shook before all the work and bounced/shook after the work. So everything I replaced even tires isn't the issue.

The suspension is is a Peterbilt Flexair or Kenworth Airglide 380 if you have any ideas where I could lookl. I replaced the top 2 torsion bars on front and rear axle. The 4 from axle to just below the spring link has had bushings replaced.

I went from back to front with a creeper pushing and prying on everything, had wife drive behind me see if any tire was bouncing wobbling etc nothing.

 

Well I know its not transmission or drive shafts don't think the rear ends will cause a bounce in the front. I dont feel anything in my seat either. Its all in the pedals, shifter, and hood