| [GMCnet] Re: Bob Drewes' outer CV boot replacement technique [message #369240 is a reply to message #369239] |
Thu, 24 March 2022 10:16   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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Hmmmm? Differences in 1 Ton axles and CV joints. Why does that not surprise
me? Well, Bill Hubler, from Idaho developed the 1 Ton front end. And
he installed a bunch of them, using the stock GMC axles and CV joints and
mating them to salvage yard Chev and GMC Truck and Suburban hubs and
brakes. Those pieces were scrounged far and wide all over the place. The
splines on the outboard CV joint were "close" to the Chev and GMC hubs, but
not quite an exact match.
Time passes, and Bill, who runs a crop dusting business as well as an
aircraft upfitting business, wanted to quit making the 1 Ton front ends. As
Bill and Manny were both GMCWS members, one thing led to another, and Manny
took over the 1 Ton business.
Manny grew tired of trying to scrounge wrecking yards for his pieces,
so he had a supplier make him 100 sets of axle assemblies. You got any
concept of how much space that many pieces and parts takes up? A whole
bunch. Several buildings at Mannys place on the side hill overlooking San
Jose, California were taken up with them. Manny's business was primarily
transmission related, and much of his shop is dedicated to rebuilding
transmissions. He does them 3 at a time. And he lays all the parts out
before he starts the process. I have been to Manny's place several times
and when he is doing transmissions, it is not the best time to interrupt
him. He is an incredible person, and his wife Deo is our travel agent. So
we have fairly frequent contact with them both. Manny fronts 1 Ton systems
into my shop, and perhaps others as well. When I have a coach that needs a
transmission, I have him ship one to my installer, Sam's transmission in
Salem, Oregon. Sam usually gives me a 2 day turn around on those deals.
So, does it surprise me if there are differences in this stuff? Not
one bit. But, 50,000 miles is a bunch. But not for the inner CV's without
torn boots. They should go a very long time. Outers?? Probably don't last
as long because of the turning left and right. But quality control is all
over the map on replacement parts. Auto Zone, O'Reilly, and others source
these things all over the planet. Is there some differences in pieces? You
bet your sweet bippy, to quote Laugh In. You do remember Laugh In, don't
you?
Jim Hupy
Salem, Oregon
On Thu, Mar 24, 2022, 6:25 AM Richard wrote:
> James Hupy wrote on Wed, 23 March 2022 18:14
>> The 1 ton is not assembled like the OEM front end. The outer CV joint
>> spline joint is an interference pressed fit. No clip.
>
> Jim,
> My original 1 ton half shafts came from Manny and they had the snap rings
> on the outer CVs. I bought two 1 ton half shafts to swap over the GMC axles
> and use the new CVs. IIRC one came from AutoZone and the other from
> Carquest - both of those had snap rings.
>
> The Manny half shafts had about 50K miles on them and I was shocked by the
> amount of wear on the inner CV bearing races. One side was bad, the other
> was much worse. I'm not sure what the life/mileage expectancy is for CVs
> in a GMC, maybe I did good getting 50K...? Boots had some cracking but
> weren't compromised.
>
> Richard
> --
> '77 Birchaven TZE...777;
> '76 Palm Beach under construction;
> ‘76 Edgemonte waiting its turn
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