Peterbilt 579 Steering problems by year

Front axle begins popping and making metal to metal noises when hitting bumps and or turning. We took it to the shop and they found the nuts to the U-bolts that hold the leaf springs to the front axle had begun backing off and were out of torque spec. Upon receiving the truck back the front end no longer made this noise. Approximately 8 months later we are hearing the same metal on metal and popping noises that we heard previously. We have also noticed similar year Peterbilt 579's with this same noise and popping so this isn't specific to our vehicle.

My 2019 peterbilt model 579 has front end issues !!!!!! I have had this vehicle aligned all three axles and on the second occasion just the steer axle. I am on my 4th set of steer tires. The truck came through with 11 r22.5 Goodyear tires they started cupping out at 25 to 35,000 miles I took them off and put on a set of 11r 22.5 General brand tires and hence had the (3)axle alignment done at approx.72 To 75,00 miles these tires cupped out so bad I had to remove them with approx 30,000 miles on them.. I went...

After hitting a bump, the steering would shake so bad it was hard to hold the steering wheel. Had to pull off on the shoulder to get the shaking to stop. After having this happen several times in one day, I took the truck to dealer where they discovered it had a bad steering box. Still waiting on the truck to get out of shop.

Bendix wingman collision mitigation system, this system as am trying to brake the vehicle determined that the vehicle in front was closer than it really was and locked the brakes and steering, at such time the driver looses control of the vehicle completely, this was the fourth time it did this, the third time it locked the brakes I was trying to brake while a car was driving out of a driveway, second time I was trying to pass a car and it detected the car to close and locked the brakes, first time bumper to bumper...