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#26 |
Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Here is the rub. The '64-'66 1/2 and 3/4 ton hubcap is physically the same height, only difference is the mounting lip underneath. This is not true for '61-'63 3/4 ton cap. Yes, the 3/4 ton cap also has a mounting lip, but the '61-'63 3/4 ton hubcap is physically taller than a '61-'63 1/2 ton cap. 1/2 ton cap far left, propped up to compesate for the mounting lip. The '64-'66 3/4 ton cap on far right is much lower than the '61-'63 3/4 ton cap middle.
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#27 |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
Today I was able to find the parts necessary to mock up a 1960-1966 17.5 8 lug wheel with a 1960-1969 3/4 ton hub and spicer lockout. It definitely will not work with this hubcap. All bolted together and the hubcap is a full inch away from seating on the rim . So that answers that . It was not meant to be for a lockout but was punched to be made larger, later , for lockouts . I did check part numbers for the Housing, which is the spacer for the lockout and only one was used 60-69 .
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#28 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Impressive mock up Jon! Was thinking the '61-'63 3/4 ton cap ( approx 3/4" taller) vs. the lower '66 3/4 ton cap would be the ace in the hole. Sure looks like it would have cleared on your old gold '66, but photos can be deceiving. Maybe a note was left in the GMC hubcap box for buyer to drill out for a custom fit to mfg's lockout hub?
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#29 | |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
Quote:
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#30 | |
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Join Date: Jan 2017
Location: Los Osos Ca
Posts: 549
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Re: 1962-1963 GMC K1500 hubcap
Quote:
Yes, it’s a short step side. Made a mistake in my OP. Truck was originally two tone light blue/white and the wheels matched the color and had same clips as the one in post #27, except of course with 6 lugs. Caps were white. Have swapped caps and rims to another member, so unfortunately can’t check the date code. So if I understand correctly all rims had the clips whether or not caps were ordered. That makes sense, so I imagine the dealer found some caps, which at the time would only have been a few years old, to fancy up the truck for sale. I know the original owner didn’t custom order the truck because early in its life he painted it green and white to match his ranch colors. If he had special ordered it he would have specified the green color at the time. So thanks to you I think the mystery is solved. Sure appreciate all the knowledge on this forum, Tom
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65 short stepside K10 292-SM420-T221 8 lug closed D44 front NoSpin HO72 4.10 rear |
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#31 |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
All lock ring /split rims had clips, yes . You could also get a regular nub wheel on a K series in 15 inch and 16 inch from 1963-1966 . There is overlap with 61 and 62 but more comes into play in those years
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#32 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
In the final analysis, any chrome early 60's 4x4 hubcap is rare, a chrome NOS 4x4 hubcap is super rare. We may never see a period photo of a small hole installed, they may never have fitted "as is". May very well have been a "cut out to fit" item. I would not hesitate to cut out the center of a NOS 4x4 cap to a larger diameter hub, if , and only if, I had a GMC Custom 4x4 worthy of the part.
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#33 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Found a photo of an original '61 Chevy 4x4 1/2 ton with a Spicer lock out, haven't found a 3/4 ton 4x4 photo yet.
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#34 |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
Heres a real deal NOS 1/2 ton clip GMC Version of that cap Factorystock . Note the red paint , GMC ONLY , Chevy was all white .
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#35 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Your right, no red paint on Chevy caps, that is rust!
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#36 |
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Join Date: Jul 2007
Location: branchburg, new jersey
Posts: 568
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Re: 1962-1963 GMC K1500 hubcap
i have a front set of chrome GMC hubcaps , they came on a 1965 GMC 3/4 ton truck, (K1500) that i bought from a fire dept in pennsyvania with only 11,000 miles on it . these were on the front end , 4x4 it says GMC on the hubcap and it looks like they were cut out at one time , either from the factory or the dealer , the truck did have the chrome package , the back side measures 8-3/4" and the front hole measures 3-3/8 thought i would supply this info if it helps
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#37 |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
Interesting , most likely added by someone at some point in the trucks life, being that these are 1962 and 1963 only caps. No hubcaps offered 64-66 on GMCs . Would be interested in seeing on the truck without the black rubber .
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#38 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
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#39 |
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Re: 1962-1963 GMC K1500 hubcap
The proof is in the GMC parts books , I do believe it was also mentioned in the Data book also . No hubcaps for K series in 1964-1966 . GMC went to 1963 but Chevrolet 1962 was the last year.
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#40 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Yeah, data books would be the last word. I might have been suckered by a July '65 Fourwheeler magazine that showed a 4x4 suburban with caps. Any owner could drill out the centers, even a dealer back in '65 to please a finicky customer. Note, optional mirrors are stainless steel Prutsmans, a GMC only option ( another ahead of the competition option from GMC).
Last edited by factorystock; 09-21-2023 at 06:18 PM. |
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#41 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Period era photo judging by the car nearby, appears to be a '60 or '61 3/4 ton. I do see a much smaller hub piece that were used to seeing protruding from the center of hubcap. The plot thickens
Last edited by factorystock; 11-25-2023 at 01:18 PM. |
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#42 |
Registered User
Join Date: Sep 2010
Location: Hancock Md
Posts: 405
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Re: 1962-1963 GMC K1500 hubcap
60-66 with your parts mockup you did do you have a spare full time hub to throw on and try a standard cap vs the one with tiny hole? Looking at the gap you have before cap would be on it doesn't look like there would be enough clearance for the little nub on flange to stick out on standard cap.
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#43 |
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Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
The previous red '60-'61 photo, IMO, is what the '62-'63 cap was designed for. Needless to say, more era photos would be nice to solve this mystery.
Last edited by factorystock; 12-10-2023 at 12:31 PM. |
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#44 | |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
Quote:
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#45 |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
I don't know , that 61 cap is a short profile cap similar to the 64-66 style . I tried that on my old 65 K20 and no hole was needed . With the 62-63 cap being so tall it clears fine . There again this 4x4 hubcap is in the parts book as a 1962 only part number . I think they figured out they did not need a special hubcap for 63 and stopped making it. Just a thought
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#46 |
Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
This factory photo shines some light on 3/4 ton 4x4 hubs. IMO, a specific wheel size must required a cap with a hole, where as, other wheel sizes did not require a cap with a hole.
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#47 |
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Location: Wisconsin
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Re: 1962-1963 GMC K1500 hubcap
If you go back to post 10, it says in the parts book that the cap with the hole is for 17.5 and 19.5 wheels. Great photo FactoryStock !
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#48 |
Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,374
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Re: 1962-1963 GMC K1500 hubcap
Thanks. I thought I knew GMC's well, then the parts book says N series, J series, G series and F series, I'm at a complete loss. Side note, I noticed the front wheel on your '65 K 20 is the correct deeper offset 17" wheel, however the rear wheel appears to be the shorter offset 17", more commonly seen in pre '60 3/4 tons.
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