1962 Brake Drums / Hubs

[John M.]

Does anyone know the correct numbers stamped on the brake drums for a 1962 corvette?
Are they identical front and back?
Are all the hubs the same for the C1s?

[John F.]

Re: 1962 Brake Drums / Hubs

I believe all the hubs are the same on a 62. Others may chime in.

John

[Pat H.]

Re: 1962 Brake Drums / Hubs

I have 2 drums that were recently turned that came off my 59 #3752633. Part # stamping isn't that great, but I believe these also fit all drum brake cars up to 1964.

[Duke W.]

Re: 1962 Brake Drums / Hubs

Brake drum casting number/part number discussions come up from time to time, and my notes indicate that the OE '59-'62 casting number is 3752623, and the finished drum number for base brakes is 3752622. These drums are 2" wide and used on both ends.

RPO 686 metallic brake drums were machined from the same castings, but had different part numbers due to a finer finish on the friction surface, and the number I have for RPO 686 finished drums is 3755504.

The casting number for 1963 2" drums used on the rear only (front drums are 2.75" wide) is 3828688, which were available as part number 3828686 for base brakes and 3828687 for RPO J-65 metallic brakes.

The ...686 drum replaced ...622 for '57-'62 base brakes, 10-63; and the ...687 drum became the service replacement for the ...504 drum for RPO 686 metallic brakes, 3-65.

Don't confuse casting number with the service part number. The service part number in the parts books is for a fully machined ready to install drum, and since one casting number was used to make two finished replacement drums - base and metallic brakes - it can get confusing.

The casting number is, of course, cast into the drum, but the finished OE or service replacement number can only be found if you have original boxes or old parts books to research.

It gets even more confusing for '63 2.75" front drums. The J-65 drums have a slightly thicker web. The web is inserted into the mold during buildup. Then the iron is poured and solidifies around the steel web. Thus the name "composite drum".

Some evidence indicates that an "X" was stamped into the thicker web to ID drums meant to be finished to J-65 standards even though the casting number was the same as base brakes.

Duke