Knocking noise, non engine related

I have a 95 chevy 1500 pickup, 2x4. About a month ago I started getting a knocking sound that would increase repitition with speed. While moving, When I curve right, the knock goes away. Also when I apply the brakes slowly, the sound gets louder but then stops after enough pressure and the vehicle comes to a complete stop. I already replaced the upper control arm bushings on the passenger side, replaced the pitman arm?, and tie arms? (the ones that go from one wheel to the other). Also the brake pads and rotors. It was suggested maybe the brake caliper needs replacement? Any help would be greatly appreciated. Thank you