New Noise when Turning after using 4WD

[Longs]

I engaged the 4WD on my '93 in a field yesterday just to loosen things up, after not having used it for several months. Even after disengaging and reversing direction to unlock the autohubs, I'm now hearing a pulsing noise when I turn the wheels, very rythemic sound.

If the hubs are disengaged, everything should be motionless except for the rotor turning on the spindles, right? I know my ball joints are a little sloppy, and my u-joints up front might also need to be changed, but that stuff shouldn't come into play when I'm out of 4WD and not spinning any of the front end components.

I haven't tried yet to reingage the 4WD to make it go away, I need to at least find a gravel parking lot for that.

Any ideas?

 

[zensius]

It sounds to me like one of your hubs is still engaged. If using the 4 wheel system again doesn't make it do away have someone watch your front u-joints to see if they turn when you drive. They shouldn't if you're in 2wd and they're disengaged.