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11-20-2008, 01:13 AM | #1 |
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1969 3/4 ton breaking 4x4 hubs - need help
Hi every one! First post here, I have a 1969 chevy pickup 3/4 ton 4x4 stock 350 with a 4 speed manual tranny. The pickup either breaks the 4x4 warn hub or loosens up the hub bolts or breaks the bolts. Anyone come across this before? I use the truck to plow snow and I don't chain up the tires. The first time it happened I put high grade bolts back in, thread lock and torqued them down. Half hour into first snow storm I hear popping sound get out and look all bolts are loose and some missing. I replace, retighten and thread lock. I get back to plowing and same thing happens accept the hub breaks. I'm lost on this one and could use your advise.
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11-20-2008, 08:01 AM | #2 | |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
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Tim |
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11-20-2008, 10:32 AM | #3 |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
I would guess that you are missing a snap ring. The bolts that hold the cap on should have no pressure on them. The bolts are only to hold the cap on, and the most pressure they should see is from the spring. If a snap ring, or a thrust washer, or the inner bearing to support the stub axle are missing or damaged, when under power, the axle would move in and out breaking the little bolts.
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11-20-2008, 04:01 PM | #4 | |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
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Thanks for your input! |
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11-20-2008, 05:48 PM | #5 | |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
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This is an external hub axle. The bolts that hold the lockouts to the bearing hubs also transfer the power to the front tires. That is why they back out and break. As I said, the solution is internal hubs where the torque is transferred with a slug from the external splines on the axle shaft to internal splines on the bearing hub.
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11-20-2008, 09:05 PM | #6 |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
have you checked your bearings?. bad brg will cause the drum to flop and pop goes the hub
ron |
11-21-2008, 12:25 AM | #7 |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
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11-21-2008, 12:23 AM | #8 | |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
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11-21-2008, 07:51 AM | #9 |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
The easiest way is to swap in an entire newer front axle assembly. In order to get an internal hub 8 lug axle, the most plentiful is a 10 bolt out of a '80 - '87 GM. A Dana 60 from a '77 - '91 K30 would be the ultimate axle if you can find one. I am assuming that you still have the drum brake front axle on the truck now, if so this swap also gets you front discs.
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11-22-2008, 10:18 AM | #10 |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
I would have this moved over to the 4x4 section (contact yukon Jack or Mudder) and maybe get more response...
Somethings not right inside the hub if you are breaking bolts like that. I would go for the hub rebuild (bearings, snap rings etc..) and fix what's broken. Is this on both sides or just one?
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The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
11-22-2008, 04:03 PM | #11 | |
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
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11-22-2008, 04:56 PM | #12 |
just can't cover up my redneck
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Re: 1969 3/4 ton breaking 4x4 hubs - need help
There are indeed "bend-tab" type washers for these hubs, but that only addersses the loosening issue. The breaking of the casting does not look normal though. I guess have something to do with the hub being loose, but loosening that quickly has to have an underlying problem.
Lool for: Loose wheel bearings Stiff axle joints Bent spindle Bad threads in the hub etc... |
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