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Old 04-22-2006, 04:50 AM   #1 (permalink)
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Superduty front axle bearing failure?

I was doing the brakes on my 99 superduty yesterday and noticed that the left front axle was turning even with the hub unlocked. I also notieced that the axle u joint assembly was wobbling quite a bit. Upon further investigation I noticed a bearing has come apart that supports the stub axle. The bearing appears to be gone and it tore the hell out of the axle shaft.

The million dollar question, can I replace just that bearing or do I have to buy a whole new hub? I would hate to have to do that as the wheel bearings feel great. If so anyone have a P/N for that bearing?

Any advice would be much appreciated.




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Old 04-22-2006, 05:26 AM   #2 (permalink)
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from all the superdutys i have messed with, the only bearing there is, is the unit bearing. And it is not serviceable, it gets replaced whole.
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Old 04-22-2006, 05:27 AM   #3 (permalink)
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Unitbearing............ 250-500 mona
Pretty common, how many miles are on it...........usually by 200k they've had 3or4 on 'em. How bout rotors? still straight?


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Old 04-22-2006, 05:32 AM   #4 (permalink)
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Yep, you have to replace the entire unit. About the best place to get it complete with everything you will need is www.powerstrokeshop.com Get ready to shell out about$300+ or so for that one side. Is your truck an early '99 or late '99. If it is an early '99 (built before March of '99) you will have to upgrade to the late model style unit bearing hub and get a late model rotor at the same time. You cannot put a late model hub on an early '99 truck and re-use your rotor. I know this is not what you wanted to hear, but if you have any more questions feel free to PM or e-mail me. I have done these plenty of times.

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Old 04-22-2006, 06:36 AM   #5 (permalink)
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Thanks for the very quick responses guys.

Truck is an early release truck with a build date of Feb 98.

To the best of my knowledge those hubs are original. I know that is hard to believe and I am aware of how shitty these hubs are lol.

Truck has 151k miles on it now.

Damn shame too as I said before the wheel bearings still feel good but such is life if she is done she's done.

I can get ford parts at cost but I am not sure what that is yet. My uncle in law is supposed to call me back today with prices.



I also know where there is a used front 10m hub here for a hundred bucks. Might buy me some time. The Wife is gonna flip when I tell her I need to buy new rotors lol.

The two million dollar question of the day. Should I upgrade the right side hub and rotor as well or is it ok to just put the new stuff on one side?

The axle has to be replaced and supposedly Napa has this part for 125. Not sure if that is complete or just the stub.
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Old 04-22-2006, 07:47 AM   #6 (permalink)
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Rule is they were put in at the same time..they'll go at the same time
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Old 04-22-2006, 07:56 AM   #7 (permalink)
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Not when they are 400 bucks apiece lol.

The only thing I am unsure of is using the two different style rotors?

I did confirm the truck has old style 10mm front hubs on it.

Last edited by 468LC; 04-22-2006 at 07:57 AM.
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Old 04-22-2006, 10:00 AM   #8 (permalink)
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I replaced the spindle bearings on my 00 without a problem. I suggest looking into that with a good parts store or bearing shop before you replace the unit bearing.
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Old 04-22-2006, 10:09 AM   #9 (permalink)
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The problem with that is I have no part number and the bearing is so far gone I can't find any signs of a number on it. I found a piece of race that had Torr on it which I am sure is torrington.

If I could change the bad bearing I would have to weld a piece of stock to the outer race of that bearing to press out the outer race. The race is so tore up there is nothing left to press or drift on to knock it out of there.
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Old 04-22-2006, 10:49 AM   #10 (permalink)
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Well sounds like my cost on a hub is about 330. 495 dealer advertised.

What a joke.

There is a spindle bearing listed for 15 bucks but they have to order it.

At this point I may just run down and buy the used one if it meets my criteria of a good part lol. Not giving up yet though. I just welded a piece of 1/4 steel to that out race and am going over to a buddies to see if it will press out.

Oh joys.
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Old 04-22-2006, 12:45 PM   #11 (permalink)
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Well just to complete the story I found those bearings now I just need to find em in stock. lol

I was able to weld on the old race and get it beat out of there.

Once I found the part number I was able to search up this thread.

It could help someone else in the future.

http://forums.thedieselstop.com/ubbt...Number=2382680
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Old 04-22-2006, 10:13 PM   #12 (permalink)
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The bearing that came apart on your rig is the Spindle bearing. Which according to FORD is a NON serviceable bearing. but it is. You can take the wheel bearing hub unit off and grease the bearing but most people will not know about this until there is a noise. And oh boy when it runs dry and squacks while driving even in 2 wheel drive its loud. The spindle bearing is lightly pressed into the inside of the hub unit and the way the front of that style of ford is the bearing is always turning 4 wheel drive or not. The spindle bearings by the way are the exact same dimensions as the dana 44 frt spindle bearings found in a number of rigs. Just ask for a spindle bearing kit for a "77 or so f150 4x4 and there it is. You don't need the seals and stuff but the bearing is there and it only costs 25$ or so cdn.
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Old 04-22-2006, 10:43 PM   #13 (permalink)
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I'm glad to hear that..of course it's too late for me...I replaced both hub units about 3 months ago...at 350. bones each...but I still have the old hubs so I will try the spindle bearing replacement...thanks...
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Old 04-23-2006, 06:46 AM   #14 (permalink)
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I want to thank pirate 4x4 for saving me a ton of money.

The first three dealerships I called said I needed a new hub including the one my uncle works at.

The fourth one finally said you can buy just that spindle bearing and that is where I got the part number. I then bought them from my local parts store for 9 bucks each lol. (amazing how a 10 dollar part can destroy a much more expensive part)

To make a long story even longer I went back into the right side and took it all the way apart and repacked the right hand spindle bearing. It is easily packable and with the right tools the job only takes about a half hour.

I got my left hub all cleaned up and new spindle bearing installed.

Hopefully monday I will find me an axle shaft and get this job done.

So much for a simple brake job lol.
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Old 04-23-2006, 06:48 AM   #15 (permalink)
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Old 04-23-2006, 07:59 AM   #16 (permalink)
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Thanks for posting up the information. Will need this in future I am sure.
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