Loud popping from under tractor

[wilsont]

I have a 2015 Freightliner Cascadia and when I turn right or left I hear a loud pop coming from under the truck. What could this be? What's the cause? And How is it fixed? Is this something that will occur again once fixed? Also when I press the brakes just barely the truck pulls very hard to one side like it's out of control while driving. What is the cause of this and how can it be repaired?