Grinding in 4 wheel drive

[freakshoww1983]

I finally got my front drive shaft put back in my truck and decided to make sure everything was working as it should. I then heard a nasty metal on metal grind when I'd make a tight turn in 4 wheel. The grind sounded rotational, only happens in 4 wheel, and only on tight turns. You could also feel a bit of a ship when turning like the tires bouncing when you turn too tight. Asked the auto part store and they said u joint behind the tire and an auto repair shop said could be the hub are worn and the spline might be slipping. U joint would be cheaper to fix but hubs are easier. Any clue on how to determine which or what it is?

 

[ChrisPerry]

Climb under truck and look at the ujoint. Thats whats nice about open knuckles.

Take a large screw driver and pry on the ears of the shafts and see if anything moves around. Should only move in and out a little and everthing should move as a unit.

 

[Zeus33rd]

Also have a look at your transmission cross-member mount. If the rubber is shot, and your t-case has a flange and not a yoke, it can cause the t-case to drop enough that the flange hits the crossmember, making the rubbing noise in 4wd only, when flange is spinning.