Actually there was no noise?? Meaning....?

 

Most likely it put tension and pressure on whatever component is worn and causing the noise when it has a little room to wiggle when in 2wd. Still recommending you pull the bearings, hubs, and visually inspect them. Just because they're relatively new doesn't mean they're still in good shape.

 

When you had this problem did the noise seem to be from the passenger or drivers side? Or couldn't really tell?

 

Couldn't tell, it was hard to pin down because it was so violent and reverberated throughout the cabin. It was bad enough that it FELT like rumble strips as well as sounding like em.

Bearings, just like brake rotors, pads, calipers, tires... should all be replaced in pairs if budget permits. That's why I did both bearings and both hubs.

 

Same with this. It FEELS like the strips. But after replacing everything on the drivers side, it could possibly be the passenger side bearing/hub...
Personal opinion, do you think best chances are Ujoints or the passenger hub/wheel bearing?

 

Unless you are locked into 4wd the front ujoint shouldnt be turning, so good chance its not the front axle ujoints. I think one of Matts earlier posts is probably the best guess with a front wheel bearing

 

Gonna try driving with hubs locked but switched in 2wd so hopefully no noise. If not, will def be checking the passenger side completely! Thanks man

 

Driving in 2wd is just going to mask and hide the issue, you seriously need to tear into the damn thing and find out what the reason is. Razzi (Toreador_Diesel) can attest to that fact. When mine **** the bed I was in the middle of a cross-country road trip towing 45-4700lbs, and I was trying to push as far as possible before repairs. The bearing noise changed pitch completely, seizing a split second later, grenaded the hub and threw me and and the trailer off the highway at 60mph into the Arizona desert. Took out a mileage sign, obliterated the windshield, and damn near rolled both rig and trailer.

Long story short, find out what's wrong and fix your ****. Now.

Driving in 2-wheel with the hubs locked isn't the best thing in the world unless you enjoy spending money and replacing hubs. I'm taking a shot in the dark here and guessing you don't pull them off regulary (every few months) to grease em up and inspect them, which really should be done. 8-15 miles at higher speeds, sure why not. But after that even synthetic high-temp grease isn't going to really enjoy what you're putting them through. Also from experience, which is why I now have Warn's on mine instead of the ESOF stocker's.

 

Have you checked the Track bar? I have seen You Tube videos of that and they really shake things up.

 

Trackbar can cause some serious death wobble, but nothing like this. It's wheel bearing or hub related.

 

Following this thread as my 02 Excursion is doing the exact same thing...

 

Hello. I had a SD f350 in the shop for the same complant. If you lock the front hubs in, and put it in 2wd and the noise ,and virbation stops. The problem is the small niddle bearings ,on the inside of the hub bearing, at the axle ,snout side. The bearing ,and axle are gaulding up. With the hubs unlocked ,the wheel hub is spinning, butt the axle is not. When you hit a bump the axle jumps around and grabs the bad bearing.Pull the hub assembly off and look at the inside bearing ,and axle. Joe

 

So you're just saying it needs new needle bearings? Seems like it's a bigger issue than that... just saying.

 

They aren't rebuildable, serviceable units. If one component is toast, it's a full replacement unfortunately.

 

Needle bearing part # Ford c6TZ-3123A Napa, Rock auto B2110 I would normaly replace the whole unit. Butt the needle bearing can be just replaced. Joe