What do these brake drums fit?

[Greg M.]

Does anyone have any idea what these brake drums fit? I was going though my garage and found these. They must have been there for a while as I don't remember where they came from. I have tried to search the numbers, but I don't have a parts book that lists them and can't find anything on a google search that helps, so thought that I would ask the knowledgable group here! Thank You for any help that you can provide!

Greg

[Dan A.]

Re: What do these brake drums fit?

3719249 1951-58 passenger, 53-8 Corvette (exc. H.D. Brake/Susp., andTaxi) front & rear

Number changed up to 3752622 some time between '58 and '61. 3752622 also applied to 58 Tax, and 59-61 passenger rear exc. metallic linings.

I don't have a '59 or '60 parts book to discern when the change occurred.

[Lynn H.]

Re: What do these brake drums fit?

My parts book effective November 1, 59, lists the 3752622 part number.
Lynn

[Greg M.]

Re: What do these brake drums fit?

Thank you VERY much! I need to clean out some of these parts and now I know what they fit! Greg

[Joe L.]

Re: What do these brake drums fit?

3719249 1951-58 passenger, 53-8 Corvette (exc. H.D. Brake/Susp., andTaxi) front & rear

Number changed up to 3752622 some time between '58 and '61. 3752622 also applied to 58 Tax, and 59-61 passenger rear exc. metallic linings.

I don't have a '59 or '60 parts book to discern when the change occurred.

Dan------


GM #3719249 was discontinued and replaced by GM #3752622 in May, 1959.

The 3719249 drum was used front and rear in PRODUCTION and SERVICE for 1957-58 Corvettes and other Chevrolets with standard brakes. The 3752622 was used in PRODUCTION and SERVICE for 59-62 Corvettes and other Chevrolets with standard brakes.

1955-56 Corvettes and other Chevrolets used brake drum GM #3717781.

I expect that the 3717781, 3719249, and 3752622 are functionally interchangeable. Certainly, 3719249 can be used as a replacement for 3717781 and 3752622 can be used as a replacement for 3717781 and 3719249. Whether there is forward compatibility I can't say for sure, but I fully expect there is.

[Dan D.]

Re: What do these brake drums fit?

I don't see how they can be used on the front, unless they get riveted to the hubs. My 57 has the front hubs riveted to the drums, but that design may have changed sometime after that. To what I don't know. I know the wheels have to have a relief between the lug nut holes in order to clear the rivet heads. -Dan-

[Joe L.]

Re: What do these brake drums fit?

I don't see how they can be used on the front, unless they get riveted to the hubs. My 57 has the front hubs riveted to the drums, but that design may have changed sometime after that. To what I don't know. I know the wheels have to have a relief between the lug nut holes in order to clear the rivet heads. -Dan-

Dan------


I don't think that the front drums were ever sold in SERVICE with an attached hub. At least, I can't find anything that would indicate that they were.

[Dan D.]

Re: What do these brake drums fit?

Thats interesting Joe. Mine are rivited together and the rivets appear to be factory peened. It looks professional. Wonder what I got here. -Dan-

[Joe L.]

Re: What do these brake drums fit?

Thats interesting Joe. Mine are rivited together and the rivets appear to be factory peened. It looks professional. Wonder what I got here. -Dan-

Dan------


I'd say they are likely original to the car. Seems unlikely after so many years but that's the only way I could see them being riveted. I don't think that any aftermarket SERVICE drums are supplied with hubs, either.

Do the drums have any casting numbers on them?

[John N.]

Re: What do these brake drums fit?

By memory the change from riveted front hub to drum to non rivited happened in late 57 Corvette production.
Happy New Year to a great group!

[Dennis C.]

Re: What do these brake drums fit?

Dan------


GM #3719249 was discontinued and replaced by GM #3752622 in May, 1959.

The 3719249 drum was used front and rear in PRODUCTION and SERVICE for 1957-58 Corvettes and other Chevrolets with standard brakes. The 3752622 was used in PRODUCTION and SERVICE for 59-62 Corvettes and other Chevrolets with standard brakes.

1955-56 Corvettes and other Chevrolets used brake drum GM #3717781.

I expect that the 3717781, 3719249, and 3752622 are functionally interchangeable. Certainly, 3719249 can be used as a replacement for 3717781 and 3752622 can be used as a replacement for 3717781 and 3719249. Whether there is forward compatibility I can't say for sure, but I fully expect there is.

Joe,

Is there a 3752623 and if so, does it have a place in 59-62 Corvettes?

Regards,

Dennis

[Dan D.]

Re: What do these brake drums fit?

Okay, seems to be making sense now. My car is mid May 57, and they probably are original. They actually were in very good shape. I had them turned, but they really did not need it - they only removed a few thousants. I cleaned, blasted and painted them, including the springs. They look good. Repacked bearings and put in new grease seals. They had the original style felt seals, which looked good by the way. But thanks to this forum I now know how to correctly torque the bearings. So I still have to do this. When I pull the wheels I will put up the part numbers of the drums. Thanks Guys. -Dan-

[Joe L.]

Re: What do these brake drums fit?

Joe,

Is there a 3752623 and if so, does it have a place in 59-62 Corvettes?

Regards,

Dennis

Dennis------


I can't find any record of any FINISHED part number of GM #3752623. However, it could very well have been the CASTING number for the GM #3752622 brake drum used in PRODUCTION and SERVICE for 59-62 Corvettes and other Chevrolet vehicles..

[Dennis C.]

Re: What do these brake drums fit?

Dennis------


I can't find any record of any FINISHED part number of GM #3752623. However, it could very well have been the CASTING number for the GM #3752622 brake drum used in PRODUCTION and SERVICE for 59-62 Corvettes and other Chevrolet vehicles..

Joe,

Thanks.

You are probably correct (as usual), I think I saw the number while redoing my rear brakes a few months ago on my '61. It was probably on the casting of the rear drums.

Regards,

Dennis

[Bill M.]

Re: What do these brake drums fit?

Dennis------


I can't find any record of any FINISHED part number of GM #3752623. However, it could very well have been the CASTING number for the GM #3752622 brake drum used in PRODUCTION and SERVICE for 59-62 Corvettes and other Chevrolet vehicles..

Confirmed. Just checked the original drums on my '59.