Chalmers suspension truck sways on freeway?

Check your shocks and torque rods for loose bolts or worn bushings. You may have to take out your shocks to check that they still work. Leaky shocks is also bad.

 

Chalmers is a pretty stout suspension. It shouldn't be swaying unless there are some worn out bushings.

I'd check the tire pressures too. Low tires are going to make it sway some.

 

What makes you think its the rear suspension causing your complaint? Is the front end light when loaded? Any chance its the steer thats wandering and you overcorrecting to compensate? Does it do it empty?

 

They make different restrictor cans that sit on top of rubber spring block. I know some are referred to as high stability.

 

Also, plate that bolts to top of beam bolts tend to loosen up and tube welded in center of plate tends to rot off. Cans and plates aren't very expensive. Give each torque rod and pull and push. Any play should be addressed. Replacing bushings are pretty straightforward. I recommend new hardware when replacing bushings. OEM ones come pre-applied with threadlocker. We also found good practice to torque the flange locknuts. Impact only was resulting in loosing spigot caps.

 

I know you said its worse when loaded then it is empty but just for shizz and giggles have you tried stopping the drum for a minute or two to see if the sway stops?? Could be rollers on the drum causing the sway and not the suspension.

 

It could also be the slump. I noticed that a mixer will handle differently with a thicker mix on board. The mix runs farther up the inside of the drum while its turning. With a low slump try running your drum a little slower.