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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

4x4 noise

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Old Jan 24, 2018 | 02:44 PM
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Armyrules2
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4x4 noise

I have a 1996 f150 xlt 4x4. So I just had my transmission rebuilt. And when I got the truck back I wanted to check and make sure my 4 wheel was working. When I put the truck in 4 wheel high and accelerate quickly I sometimes hear a scrapping or grinding noise coming from the front passenger side of the truck. Keep in mind I have manual warn locking hubs. But when I put it low range it doesn't do it. And it also doesn't do it all of the time. My 4 wheel is working though because if I gun it I'll spin the tires in the mud.
 
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Old Jan 24, 2018 | 02:47 PM
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From: Semper Fi tell I die!
maybe its that center ujoint on the front ttb
 
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Old Jan 24, 2018 | 02:49 PM
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The u-joint on the drive shaft? Or the bearing that's in between the two halves of the ttb?
 
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Old Jan 24, 2018 | 03:12 PM
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From: Semper Fi tell I die!
2 halves is what i would shoot for
 
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Old Jan 24, 2018 | 03:12 PM
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Originally Posted by Armyrules2
....Or the bearing that's in between the two halves of the ttb?
What bearing are you talking about?
 
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Old Jan 24, 2018 | 03:13 PM
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Could be a hub not completely locking too
 
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Old Jan 24, 2018 | 03:14 PM
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Originally Posted by My4Fordtrucks
What bearing are you talking about?
What's in between the two halves of the axle?
 
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Old Jan 24, 2018 | 03:15 PM
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Originally Posted by skuzzybucket
Could be a hub not completely locking too
How could I test that because that's what I'm thinking it is.
 
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Old Jan 24, 2018 | 03:18 PM
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From: Semper Fi tell I die!
crawl under it and yank the heck out of it with your hand youll know if that ujoints bad
 
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Old Jan 24, 2018 | 04:39 PM
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To test hubs



1)lock right hub

2)turn front drive shaft by hand until it stops turning. if it don't stop, right hub is bad

3)Unlock right hub, turn drive shaft till free

4)lock left hub
5) turn front drive shaft until it locks. if it don't lock hub is bad

6) unlock hub

Hubs make an ungodly noise when they aren't locked all the way. Plastic eating itself up is hard on the ears

Skip is right about the axle bearing in the long axle ,look for oil running out of the seal there where the axle comes out for a tell tale sign too
 
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Old Jan 24, 2018 | 04:53 PM
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From: Semper Fi tell I die!
i didnt mean axle bearing i meant ujoint in center of ttb, its actually a bearing too needle bearings in the caps. but i just miss typed and said bearing instead of ujoint.
 
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Old Jan 24, 2018 | 06:16 PM
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96 has a bearing in there skip
It changed in 92
 
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Old Jan 25, 2018 | 05:55 AM
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This might help (from the '96 service manual):
 
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