Front axle slop? - Ford Powerstroke Diesel Forum
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post #1 of 25 Old 05-12-2019, 10:51 AM Thread Starter
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Front axle slop?

I have an '07 f250 and it needs axle u joints. When I was checking the u joints I noticed the the axles had some slop in the hub. How much play is ok? I assume that one ball bearing is responsible for centering the axle, or does the locking hub act as a second bearing?
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post #2 of 25 Old 05-12-2019, 01:20 PM
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How much "slop" does yours seem to have??



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post #3 of 25 Old 05-12-2019, 02:42 PM Thread Starter
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How much "slop" does yours seem to have??
Maybe 1/4" at the back of the knuckle. The axle to knuckle seals are shot, and I don't want to replace them again if the axle slops around and destroys them.
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post #4 of 25 Old 05-12-2019, 03:36 PM
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Needle bearings in the hub out?

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post #5 of 25 Old 05-12-2019, 03:57 PM Thread Starter
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Originally Posted by Hydro View Post
Needle bearings in the hub out?
That is what I thought, but it turns out there is only a single sealed ball bearing. Unless you are speaking of the needle bearing in the locking hub, but I'm not sure if those can be replaced.
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post #6 of 25 Old 05-12-2019, 08:36 PM
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Correct the stub axle uses sealed bearings in the center of the unit bearing on the 05 up the needles were 04 under
the sealed can still fail but not nearly as common as the needle
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post #7 of 25 Old 05-12-2019, 09:17 PM Thread Starter
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The sealed bearing has zero vertical play, and seems perfectly fine. The auto hubs were so packed with grease that I didn't realize there were needle bearings in them. I'm wondering if the needle bearings went dry and it was packed with grease to avoid buying new hubs. I may just order a new hub and see if that tightens things up a little.

I'm also having a hard time finding the "seal" ring that keeps debris out of the axle tube. Any idea what that is called?
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post #8 of 25 Old 05-13-2019, 04:30 AM
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It's called a dust seal. Ac3z-1s175-a


Also, if you don't have one, a long (3ft+) wrecking pry bar will pry those axle shafts out like nothing.

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post #9 of 25 Old 05-14-2019, 09:34 PM Thread Starter
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It's called a dust seal. Ac3z-1s175-a


Also, if you don't have one, a long (3ft+) wrecking pry bar will pry those axle shafts out like nothing.
That appears to be an upgraded seal, and looks nothing like the remains I have. I was also very surprised how much force it took to dislodge that seal, I had to kick a 3' bar.
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post #10 of 25 Old 05-14-2019, 09:38 PM
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just FYI you can pull a 4x4 auto hub off and drive without issue it is not responsible for supporting the stub shaft in any way

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