Need to know part application

[Garry B.]

Can someone provide me with the application for part number 3964511? I have four of these and they look like the centers to a C1 hubcap spinner with out the blades. Thanks.
Garry
18531

[Jack H.]

Re: Need to know part application

A search of the archives turns up a post regarding GM drawings from Michael Pierce with the following entry:

3964511 Wheel Assembly Cover 10/30/68

[Garry B.]

Re: Need to know part application

Jack, what did you use as your search criteria? I didn't find anything.
Thanks.
Garry

[Jack H.]

Re: Need to know part application

Gary...load your Google search engine with 'GM 3964511' and it should echo you to the DB post. I find it's often easier to use one search engine instead of learning the nuiassences of the hand crafted utilities on this/that discussion board/chat room...

[Garry B.]

Re: Need to know part application

Thanks Jack. I think I am on the right track now.
Garry

[Joe L.]

Re: Need to know part application

Can someone provide me with the application for part number 3964511? I have four of these and they look like the centers to a C1 hubcap spinner with out the blades. Thanks.
Garry
18531

Gary-----


GM #3964511 was never available in SERVICE from GM. However, from what I can tell, it appears to me to be a component of some SERVICE-only C2 wheel covers. I believe these were the "non-spinner" versions of the C2 wheelcovers.

[Garry B.]

Re: Need to know part application

Joe, I am not quite sure what you mean by "service" only C2 wheels. Can you explain a bit more please?

[Garry B.]

Re: Need to know part application

This is what they look like:

[Mike E.]

Re: Need to know part application

Garry--
That's the wonderful piece that GM made available for 56-62 hubcaps as a service part once the feds decreed that you couldn't have spinner hubcaps any longer because of the "multitude of terrible accidents, maimings, and deaths" that resulted from those spinners sticking out so terribly far from the cars.

[Garry B.]

Re: Need to know part application

Really?! That's very interesting. Roughly when did this happen? It does make some sense. The backs are shaped to adapt to the curve of the center most portion of the hubcap and there are four female screw holes. Have you seen many of these? This is the only set that I have ever seen.
Thanks Mike.
Garry

[Ernie F.]

Re: Need to know part application

Gary,


What Joe means is this was a service replacement part, maybe part of an assembly!

However, I have some NOS hubcaps and they did not include any type of cap with them.

I wonder if they were just a service replacement part for the original spinner?



When did this start? I would have to check but I believe this all started in late 1967 or 1968.

Notice the font size in the lettering. This is the correct font for the original hub cap spinners unlike any being produced today. If you could compare this to a reproduction you would see the letters are much crisper!

Ernie

[Joe L.]

Re: Need to know part application

Joe, I am not quite sure what you mean by "service" only C2 wheels. Can you explain a bit more please?

Garry-----


In late 1969, GM released SERVICE wheel cover GM #3964521 to replace wheel cover GM #3865938 which was used in PRODUCTION and original SERVICE for 1965 Corvettes. Later, wheel cover GM #3888813, the 1966 PRODUCTION and original SERVICE wheel cover, was replaced by SERVICE-only wheel cover GM #3964518.

Both of these SERVICE-only wheel covers had two things in common. First, they did not use a "spinner" type ornament as did the original wheel covers and, second, they used ornament GM #3964515 in place of the original "spinner" ornament. Also, after 1969, the GM #3964515 ornament replaced the 65 and 66 "spinner" ornaments for SERVICE of original wheel covers and the "spinner" ornaments were no longer available from GM.

I believe the ornaments you have are the GM #3964515 ornaments. They may be stamped or embossed 3964511 but that may just be the casting number for that component of the ornament and not the finished part number. These ornaments were NEVER used on a PRODUCTION vehicle but were released only to comply with the government safety requirement that Mike mentioned.

I have no information that any SERVICE-only wheel cover or associated ornament was released for any pre-1965 Corvette. I'm not saying it did not happen, only that I have no information indicating that it did happen.

[Garry B.]

Re: Need to know part application

Joe, as usual you are a wealth of information. Based on your insight I am concluding that these were intended for a '65, but could be used for later model years. Here is the photo which clearly shows 511 and it's designated as the part number. Sorry for the size of the pic. can't seem to get it reduced.

Ernie, thanks for your comments as well.

[Steven B.]

Re: Need to know part application

Really?! That's very interesting. Roughly when did this happen? It does make some sense. The backs are shaped to adapt to the curve of the center most portion of the hubcap and there are four female screw holes. Have you seen many of these? This is the only set that I have ever seen.
Thanks Mike.
Garry

The '67's saw the beginning of the "no spinner" regs. I believe it was Mass. that shortly thereafter would not allow side exhaust. I am sure someone else knows the exacts on that. As we all know there were untold incidents of spinners clipping people (as seen by the vast numbers of people limping around today) and covered headlights fully distorted lighting (the defracted light was viewed by the FAA as a danger to aircraft above 30,000'). Unfortunately a few burned their legs on side mounts---but mostly those great looking and sounding Kustom's and Hooker's.

[Jerry G.]

Re: Need to know part application

I think i have four of the outer rings that your part goes into. They are part number 3964519. i recieved these when I ordered spinner replacment parts for a 65 hubcap back in 1972. If anybody wants to own this quirky part let me know.