steering issue

[detroitmuscle1986]

Lately in 4wd the truck will erratically pull from side to side. It doesn't happen in 2wd so it leads me to believe maybe a bad hub? I'm really stumped as to what it could be. I have recently replaced the kingpin bushings. The truck is a m1028 so it does have the posi front end. Any suggestions as to what the issue could be would be great!

 

[porkysplace]

Check the axle u-joints.

 

[doghead]

Yup, when they bind, steering gets funny like that.

 

[detroitmuscle1986]

I'll give it a look and see how warn they are.

 

[doghead]

Look for rust at the cap to cross points.