Truck leans to the right

or you cab shocks could be u/s

 

Take off the RH fuel tank. Boom, weight compensated.

 

Measure on a LEVEL shop floor the axle end stops on all 6 locations (assuming you have a traditional chassis). Also all tires should be the same air pres. and brand with their associated tire-mates. According to my spec, you are allowed about a 1/2" lean from the factory (depending on mfg). This would be the only other true way of knowing if it's the drivetrain axles to chassis leaning, or the cab to chassis. I think there were some other good ideas posted on here of what it might be and the direction of how to truly diagnose where the lean is coming from.

Another thing you can check is your turning linkage on your steering gear. See if some things shifted if it was indeed involved with an accident. Maybe the axles aren't clamped correctly on the big U-bolts. Something along those lines can be causing your "plastic" noise.

 

So the OP's truck is a Republican?

 

If you have a Apu on that side can also cause that replaced driver side springs on my prostar,,,,still had a lean,,,500lb Apu on the same side,

 

I have the same problem but on the driver side.. I’ve had both leaf springs changed and still have the same problem

 

I have the same problem but on the driver side.. about a year ago I heard knocking on the drive side and changed the bushings on the springs .. 6 months later same sound so I changed both springs but the truck is still leaning

 

Driveline torque twists the whole thing to the passenger side, plus heavy 1-box, plus heavy APU, plus sitting in the right lane for years with road crown tilting to the right, plus all left turns being faster and longer than right turns. My hips are titled from sitting like that for 4 years now, when I stand up and relax I'm leaning to the left

 

I have a 2024 Peterbuilt 579 and my bumper is hanging way lower on my passenger and has a bigger gap

 

That should be repaired under warranty.