11-14-2021, 08:32 AM | #21 |
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Join Date: Jul 2010
Location: 36 miles north of Albany NY
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Re: Busted Axle
My Ford 8n rear axle torque was 450 ft.lbs., I used a 3/4 in drive breaker bar and a 6ft. Pipe to tighten up that one.
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11-14-2021, 10:55 AM | #22 |
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Location: San Antonio, Texas
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Re: Busted Axle
Fatigue will kill them all eventually. One a crack gets started, it will propagate and fail at some point. You can inspect the break and sometimes see the dark area where it had been cracked for some time and then you can see the very clean spot where it finally failed.
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11-14-2021, 09:37 PM | #23 | |
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Location: Williamsburg, VA
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Re: Busted Axle
Quote:
I did lap the old drum to the new axle, using valve grinding compound. It looked like a perfect fit. I put the axle nuts on with my battery impact wrench on the high setting until it stalled. Then I put as much weight as I could (without losing my balance) on the torque wrench; probably over 100 pounds on an 18" lever. Did not budge, so I think I am okay. Got lucky on alignment of the cotter pin holes! |
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11-15-2021, 10:42 AM | #24 |
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Posts: 426
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Re: Busted Axle
I have put 2 or 3 pumps of the grease gun into the rear axle fittings on 3 different 38 Fords. Never had a problem. Moderation is the key.
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11-16-2021, 09:13 PM | #25 |
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Re: Busted Axle
mike the housing race if it,s worn the axle will brake again from fatige
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11-17-2021, 10:58 AM | #26 |
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Re: Busted Axle
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11-17-2021, 12:46 PM | #27 |
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Location: San Antonio, Texas
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Re: Busted Axle
I think he was referring to the ones with a lot of wear that allow the hub to move around more that it should. This starts to change where pressure is applied in the assembly. The axle is made to absorb torque but not so much for bending loads.
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11-17-2021, 12:55 PM | #28 |
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Location: NJ
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Re: Busted Axle
This is not meant to push his products, but my advice is to get a new, NOS axle from Fred @ Southside Obsolete. Not much more in price than finding a good used one.
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11-17-2021, 12:57 PM | #29 |
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Re: Busted Axle
He has those? I wouldn't have guessed there were any available anywhere!
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11-17-2021, 01:28 PM | #30 | |
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Re: Busted Axle
Quote:
Well worth the piece of mind to me since tearing down a rear ranks up there as one of the biggest PITA jobs to do when it's in a car. |
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11-17-2021, 07:09 PM | #31 |
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Re: Busted Axle
I got my NOS axle from All Ford Parts in Campbell CA. They are getting scarce and the price reflected that. But it was the correct fit and delivery was prompt.
Regarding potential axle stress due hub slack from excessive wear: With the shoe fully retracted top and bottom, my drum was tight on its bearings. For the axle to pick up any vertical load the bearing surfaces would have to wear enough for the axle shaft to ride up and rub on the inside of the axle housing where the axle passes through the housing bearing area. That is at least 1/16 inch = a lot. That would probably cause brake problems, and cause a grinding sound. I have worked on a lot of worn out early Fords and never found the rear hubs loose on their bearings. I am sure it is possible, particularly if the bearings run dry. Which brings up another question. If parked on a sideways slope and/or going around a long turn, does any of the differential lube find its way into the rear wheel bearings? Given that Ford deleted the rear axle zerks, I suspect the answer is "yes". |
11-17-2021, 07:47 PM | #32 |
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Re: Busted Axle
[QUOTE=drolston;2077166]Regarding potential axle stress due hub slack from excessive wear:
For the axle to pick up any vertical load the bearing surfaces would have to wear enough for the axle shaft to ride up and rub on the inside of the axle housing where the axle passes through the housing bearing area. That is at least 1/16 inch = a lot. That would probably cause brake problems, and cause a grinding sound. I have worked on a lot of worn out early Fords and never found the rear hubs loose on their bearings. I am sure it is possible, particularly if the bearings run dry.[QUOTE] It is entirely possible and quite common. I have sleeved at least 100 early Ford axle hoiusings and rejected twice that number for sleeving because they were worn so bad the axle had chewed up the inside. The outside bearing surface was worn over 1/8 inch. |
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