Gost noise on 03 F-350

[arriero4x4]

Hi guys,
I was driving home last weekend and a strange noise appeared. i stopped and took a quick check and nothing seemed to be out of place. i continued and the noise appeared again, sometimes when i pass a bump, sometime driving straight. It sounds like something gets out of its center and then it stops.
Its not bearing because its not constant.
Its not engine because i shift to neutral and noise continues
Its not breaks because i started stopping and the noise was still there
Every part has the oil levels as recomended (tranny, transmission, axles, engine)
I took a look under the complete truck, there is no sign of something out of place, parts hitting or broken.

Any advice? ideas?

Thanks guys
arriero

[arriero4x4]

It seems it's the locking hub. it's an auto/lock hub. Any idea on how to take it apart?

thanks
arriero

[arriero4x4]

ok, i serviced the locking hubs, but the noise continues.....
it sounds like when the ABS starts working, but the speed remains the same, so its not braking.
I hope i wont get the front end locked in the highway.....
has any of you have had the same problem? A friend told me it may be the tranny is not disconecting....

thanks
arriero

[BDSford03]

pull the locking hub completly off the truck drive around and see if it is still there. I had a problem like this and then i put Warn hubs on.

[arriero4x4]

just take it out? and drive around... i'll try today back from work. tomorrow i'll post.

[arriero4x4]

i took out the locking hubs. i was unable to drive a block and the noise and shake was worst, so i put'em back in. i realized when i took out the hubs, they were "activated" or locked (in the auto position).
So.... are the hubs the problem or the bearings? the end of the outer axleshaft has some axial movement. is that normal?

thanks

[BDSford03]

when you pull them off there is nothing to lock in the axle shaft and the tires should be freely spinning on the Wheel bearings. (the Axle shafts should not be spinning.) I am not a expert but it sounds like wheel bearings.

[arriero4x4]

thanks man. i didnt have much time this weekend to check the bearings. maybe during the week after work i'll check them out.