king pin help wanted

Sorry, I just had a nice long post typed out to help you, and somehow I lost it. Here is the quick answer. Rotate your tires. Get a 3 axle alignment and see how bad the rear axles are and if they need adjustment. You have a nice suspension but that is the type either you can or can't do. It depends on the type of bushings you have. Some are a bit smaller where it bolts to the axle hanger to accommodate the alignment shim. If your axles are out big-time and you don't have the align-able type, you would have to change all 4 bushings. Not cheap. The alignment shim is part 34 in the picture I included. It can only be installed one of three ways to get a coarse adjustment only, but it helps.

 

I just priced Sumitomo 425/22.5 at my tire shop in Okc for my truck last week. $473.00

 

To check the king pins you put the bar in the tire rim and pull up to get the tire to rock in and out. Lifting the tire up and down is how you check the bearing, and the shim setting. As it is with 99% of things on a truck maintenance works, Grease

 

Usually a tag on front of axle, middle of beam, directly under oilpan. Crawl under front bumper and if it is still there, you will see it.

 

Could possibly be the Tie Bolt in the middle of the spring. Look at the pillow block where the U bolts connect the spring to the axle. Look for slide marks on the spring. it happens that a hard bump can sometimes shear off the tie bolt. It sometimes makes the truck turn sharper one way than the other too

 

Then again might be cheap tires , cheap tires wear faster i would myself , take too frame shop, too just too be sure everything inline before any front end work, dumps trucks or any truck thats hauls big loads , get abused very badly , i seenm those big tires and there not cheap.