2005 ford f150 Fx4 So last Friday I started hearing a grinding noise from the passenger side front of my truck. sounded like metal on metal. So I started rooting around and noticed that bottom ball joints were shot. so replaced bottom ball joints on both side. I aslo replaced wheel bearing hub assembly on both sides, still heard the grinding. So I noticed that both axles were slinging grease, so I replaced them on both sides. Still heard the grinding noise. So then I removed everything from the passenger side and noticed that the locking hub actuator was grinding both axle and the wheel bearing hub. So I just got done replacing that on the passenger side, put it all back together, and still grinding noise. Also replaced the 4wd solenoid that they said gets water in it, and I replaced the check valve. And I put new Rotors and breaks. Does anyone have any other idea of what it could be? I'm driving my self crazy and going broke. Any help would be greatly appreciated.

 

Most likely a cracked vacuum line or the drivers side IWE.. troubleshoot with a vacuum pump.