I recently installed new ball joints, and bushings all around. Yesterday I went out for some 4x4'n. I found that I now have a know in 4wheel drive.. I had to remove the front axles to access the ball joint. Did I mess something up reinstaling them? It is a metal on metal kind of sound.

 

Backing plate rubbing rotors ?

 

X2............I had that issue after installing my lift kit.

 

Thats the brake protector plate right?
The sound dosent come in 2wd. Also there seams to be alot more noise when driving down the road in 4x4. Like something is rubbing/scraping

 

Oh..........then your noise might be something different. My backing plate would only rub for a second when I had my wheels turned to the right while backing up (like backing out of a parking space) but, it was a horribly loud noise.
A long screwdriver (to get through the wheel) and a couple of taps with a hammer made it go away.

 

B chance you have the vacuum disconnect front axle ?

 

No idea, its a 1992 Dana 30.
Was i supposed to grease up the axles before sliding them back in?

 

no grease , sounds like some things hitting between axle u joint and hub