Auto hub questions
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Laughing Gas
Joined: Oct 2017
Posts: 922
Likes: 7
Auto hub questions
I have a 2001 f250 4wd with the electronic 4x4 switch on dash.
As I was doing some maintenance (brake fluid flush, lube the brake slide ins, install new brake disc and lubricating the hubs thru the abs hole (great tool available !!)) I tried switching the manual hubs on.
With the manual hub dis-engaged I can spin the hub itself. The knuckle is not spinning. This is what I expected.
Then I engaged the manual hub on drivers side. When I spin the hub I see the knuckle spinning as well. Also what I expected.... BUT I don't see the driveshaft that runs from the front differential to the transfer case spin at all. Is this normal ? I though that the front driveshaft would spin as well when I engage the manual hub. ?
Also, on the inside of the hub (where the knuckle starts , from outside to inside) there is a plastic ring that doesn't seem connected to anything. Passenger side it seems to be connected but is a bit loose. Any idea ?
As I was doing some maintenance (brake fluid flush, lube the brake slide ins, install new brake disc and lubricating the hubs thru the abs hole (great tool available !!)) I tried switching the manual hubs on.
With the manual hub dis-engaged I can spin the hub itself. The knuckle is not spinning. This is what I expected.
Then I engaged the manual hub on drivers side. When I spin the hub I see the knuckle spinning as well. Also what I expected.... BUT I don't see the driveshaft that runs from the front differential to the transfer case spin at all. Is this normal ? I though that the front driveshaft would spin as well when I engage the manual hub. ?
Also, on the inside of the hub (where the knuckle starts , from outside to inside) there is a plastic ring that doesn't seem connected to anything. Passenger side it seems to be connected but is a bit loose. Any idea ?
Posting Guru
Joined: Dec 2016
Posts: 1,284
Likes: 2
From: Bozeman MT
I have a 2001 f250 4wd with the electronic 4x4 switch on dash.
As I was doing some maintenance (brake fluid flush, lube the brake slide ins, install new brake disc and lubricating the hubs thru the abs hole (great tool available !!)) I tried switching the manual hubs on.
With the manual hub dis-engaged I can spin the hub itself. The knuckle is not spinning. This is what I expected.
Then I engaged the manual hub on drivers side. When I spin the hub I see the knuckle spinning as well. Also what I expected.... BUT I don't see the driveshaft that runs from the front differential to the transfer case spin at all. Is this normal ? I though that the front driveshaft would spin as well when I engage the manual hub. ?
Also, on the inside of the hub (where the knuckle starts , from outside to inside) there is a plastic ring that doesn't seem connected to anything. Passenger side it seems to be connected but is a bit loose. Any idea ?
As I was doing some maintenance (brake fluid flush, lube the brake slide ins, install new brake disc and lubricating the hubs thru the abs hole (great tool available !!)) I tried switching the manual hubs on.
With the manual hub dis-engaged I can spin the hub itself. The knuckle is not spinning. This is what I expected.
Then I engaged the manual hub on drivers side. When I spin the hub I see the knuckle spinning as well. Also what I expected.... BUT I don't see the driveshaft that runs from the front differential to the transfer case spin at all. Is this normal ? I though that the front driveshaft would spin as well when I engage the manual hub. ?
Also, on the inside of the hub (where the knuckle starts , from outside to inside) there is a plastic ring that doesn't seem connected to anything. Passenger side it seems to be connected but is a bit loose. Any idea ?
Posting Guru
Joined: Dec 2016
Posts: 1,284
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From: Bozeman MT
I lived in CO when I had my 2000 6.8.l, I had limited slips installed F and R and they paid for themselves on Mosquito Pass 13000+ feet near Leadville. Had a road break free that strande me, built a rock driveway on the path out and then had six people stand in the bed, worked.
Posting Guru
Joined: Dec 2016
Posts: 1,284
Likes: 2
From: Bozeman MT
That was a “dust seal” that was connected to the rotating axle and rubs against the spindle, until it degrades. Almost every truck has the “plastic ring” hanging there... nobody gets too concerned.
Senior User
Joined: Oct 2017
Posts: 130
Likes: 1
From: North of Milan
I would use caution "lubricating" the bearing thru the ABS hole...the hubs are sealed bearings with very tight clearance through the race. Adding too much grease/oil in these areas could easily cause a overpressure/overheat in the bearing sub assembly and cause it to fail prematurely. In the days of old bearings were separated from each other measured in fractions of an inch and thus could be "packed" with grease. The newer bearings (caged) have much tighter tolerances and as such only need a defined amount of grease/lubricant. I have been on accident investigations where it was found an over zealous maintainer over greased a bearing assembly and caused a tail rotor shaft bearing to overheat and part in-flight. Not a good outcome. Granted we are talking about trucks firmly planted on terra firma, but why risk a bearing failure?
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Laughing Gas
Joined: Oct 2017
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I would use caution "lubricating" the bearing thru the ABS hole...the hubs are sealed bearings with very tight clearance through the race. Adding too much grease/oil in these areas could easily cause a overpressure/overheat in the bearing sub assembly and cause it to fail prematurely. In the days of old bearings were separated from each other measured in fractions of an inch and thus could be "packed" with grease. The newer bearings (caged) have much tighter tolerances and as such only need a defined amount of grease/lubricant. I have been on accident investigations where it was found an over zealous maintainer over greased a bearing assembly and caused a tail rotor shaft bearing to overheat and part in-flight. Not a good outcome. Granted we are talking about trucks firmly planted on terra firma, but why risk a bearing failure?
Discovered my balljoints are bad... ugh. upper/lower on the drivers side and upper on passenger side.
I think I will let someone else do this... How hard is it ?
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Senior User
Joined: Oct 2017
Posts: 130
Likes: 1
From: North of Milan
Well, you would be surprised at the bearings on a aircraft versus a truck. The main hub bearing on a H-60 looks like a old Mack truck bearing and makes the wheel bearing on the Super Duty look like it should be on the space shuttle.
As far as the ball joints. Not that difficult with the proper tools, patience, and a hammer...check this out: Ford Super Duty Ball Joint Replacement Procedure - Superdutypsd.com
As far as the ball joints. Not that difficult with the proper tools, patience, and a hammer...check this out: Ford Super Duty Ball Joint Replacement Procedure - Superdutypsd.com
Senior User
Joined: Oct 2017
Posts: 130
Likes: 1
From: North of Milan
I don't have personal experience with the ball joints. But Moog seems to be popular and reputable...definitely stay away from the ebay chicom stuff though even if the price is nice. There is always Motorcraft....
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Laughing Gas
Joined: Oct 2017
Posts: 922
Likes: 7
That's an excellent write up. I might just attempt to do it myself. I do need some more tools for it.. But the truck is already up on stands, front brakes/discs removed since I'm waiting for new discs.
Senior User
Joined: Oct 2017
Posts: 130
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From: North of Milan
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
Be careful with Moog ball joints. They used to have to a great reputation, but not so much lately. I would do a search on it. It's not too hard of a job, but having all the right tools makes it a lot easier.
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Laughing Gas
Joined: Oct 2017
Posts: 922
Likes: 7
Yeah, that's kind of the impression I got researching it. Years back everyone raved about them but lately not so much. Just go motorcraft?