| Two different spindles on the back of my 77 PB [message #334845] |
Mon, 09 July 2018 10:50  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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So I have the rear hubs off to do the rear bearings. When cleaning up the retaining nuts I noticed the ones from the drivers side are larger than the passenger side. I measured the spindle size where the bearings go and they are the same 1.03" and 1.63" approx. on all 4.
The thread size diameter measures 0.73" on the passenger side and 0.84 on the driver's side. Obviously the spindles on one side have been changed at some point. Bearing size seems the same.
Can anyone shed some light on the two different sizes?
Thanks
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
[Updated on: Sun, 16 December 2018 08:34] Report message to a moderator |
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| Re: [GMCnet] Two different spindels on the back of my 77 PB [message #334846 is a reply to message #334845] |
Mon, 09 July 2018 11:13  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Sounds like a trip through the parts book would be in order. I know that
the bogie pins changed from one size to another around 1975 model year, and
bouncing around in my cranial cavity (void) there seems to be a memory of a
recall on the spindles about the time of the hydraulic drum brake upgrade
to self adjusters. But like I said, memory being what it is........
Jim Hupy
Salem, Or
78 GMC Royale 403
On Mon, Jul 9, 2018 at 8:50 AM, Bruce Hislop wrote:
> So I have the rear hubs off to do the rear bearings. When cleaning up the
> retaining nuts I noticed the ones from the drivers side are larger than the
> passenger side. I measured the spindle size where the bearings go and
> they are the same 1.03" and 1.63" approx. on all 4.
>
> The thread size diameter measures 0.73" on the passenger side and 0.84 on
> the driver's side. Obviously the spindles on one side have been changed at
> some point. Bearing size seems the same.
>
> Can anyone shed some light on the two different sizes?
>
> Thanks
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Two different spindels on the back of my 77 PB [message #334866 is a reply to message #334858] |
Mon, 09 July 2018 15:54 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Bruce, I would think that the diameter of the threaded portion of the
spindle should match the washer. Because the washer tang indexes with the
slot in the spindle, you wouldn't want very much play there.
Jim Hupy
On Mon, Jul 9, 2018, 12:14 PM Bruce Hislop wrote:
> So now I have noted the spindle washer is the same on both sides, so on
> the passenger side the washer is loose fitting on the spindle threads. I
> can
> find Dorman 3/4" holed spindle washers, but none 2.25" OD. Most are about
> 1.75".
>
> Should I stay with the existing 7/8" washer on a 3/4" spindle but with the
> larger OD, or go with a smaller OD but fits the 3/4" spindle?
>
> What say yea?
>
> Thanks
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Two different spindels on the back of my 77 PB [message #334882 is a reply to message #334880] |
Mon, 09 July 2018 18:58 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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I have recall of that, but was unsure of the details. Your message stirred
that up a bit. I don't exactly remember the minute specs. I thought the
bearing diameters were different, but you have direct evidence to the
contrary. If the spindles are in good condition, and the drums and seals
are good, I would be inclined to use them until they are not.
Jim Hupy
On Mon, Jul 9, 2018, 4:45 PM Bruce Hislop wrote:
> I located a recall campain from May/74 for '73 and '74 motorhomes to
> replace the spindle and hub. This was to install larger bearings. But the
> bearing
> surfaces on both sizes of spindles are the same in my case. Only the
> thread for the retaining nut is different from side to side. 3/4" vs 7/8"
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: Two different spindles on the back of my 77 PB [message #339579 is a reply to message #334845] |
Sun, 16 December 2018 08:33 |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Senior Member |
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Following up on my post from last summer about my rear left and right spindles had different size threads.
I found this Recall Notice from 1974 which includes replacement spindles. It said the recall was to install larger outer wheel bearings, but both sides had the same outer wheel bearing. All seems to fit fine except the size of the stud for the retaining nut. One side being 7/8" and the other 3/4"
I did get some washers that should fit the 3/4" side. The outer diameter is smaller though.
Anyone see any issue with continuing to use this smaller stud spindle?
Here is the recall I found:
http://bdub.net/manuals/74-C-07_spindle_recall.pdf
Thanks
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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