kenworth dump truck is binding up

Disconnect and remove the short driveline between the drives to see if this continues...then re-post, thanks.

 

The Kingpin will cause your front end to hop around but I don't exactly understand how that's related to the rear end binding up. It's easy enough to check your kingpins Just Jack your front end up and put a bar underneath your wheel and see if you have play in the Kingpin.

Did you replace your carrier bearing and have your drive shafts balanced, even the small one between the Rears?

 

I would suggest to make sure your bearings are good and that they are adjusted correctly.

Bearings expand when they get hot, and if they are adjusted too tightly they won't roll freely and you will burn them out.

And if your carrier bearing has play then you should replace it.

 

Before you completely move away from (and eliminate) the rears as suspect, lets discuss the "angles" that the rears have been mounted in regards to the suspension and driveline since everything has been replaced...some of these items are built with a intentional "fixed taper" for proper installation and can be installed backwards resulting in too great of an angle for the driveline. Is all of this standard equipment or modified/upgraded for heavier loads. I have seen these simple mistakes (it happens), from tired eyes with the best intentions. Re-evaluate the build-up process and all the items REQUIRED for installation (not just what was there), from there it can only be the clutch/transmission, which presents its own inspection and re-evaluation. YOUR the only eye's we've got.

 

You didn't mention replacing the Ujoints to eliminate them. Checking the pinion shaft for play and tightness.

 

Id check to see if the interlock is fully disengaging.... Or if there may be an air leak causeing it to slowly engage while your driving.