63 / 64 Rear Drums

[Harry S.]

This is a one on me, so I'll ask for opinions. Just cleaning up a set of rear drums I pulled off of a 64 15 years ago. They are 3828688. The strange this is one is stamped L and one is stamped R. Opinions...

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[Mark T.]

Re: 63 / 64 Rear Drums

Harry I am not sure why they are marked left and right
But back in the day when I was a kid working in the Auto Parts store I machined hundreds of drums and rotors
The mechanics always marked them left and right so they would be returned to their original position
Mark

[Harry S.]

Re: 63 / 64 Rear Drums

Mark, that was my first guess.

[Dan H.]

Re: 63 / 64 Rear Drums

Harry, my 64 had metallic brake shoes, J65, front has an X stamped in it, rear had L stamped in it, were 688 castings on rear. FWIW.
Dan

[Joe R.]

Re: 63 / 64 Rear Drums

Several reasons they may be marked R or L and front or rear BUT they are is no such animal.

All are the same. Passenger cars are the same.

JR

[James G.]

Re: 63 / 64 Rear Drums


I had read that the std and J65 drums were the same casting number, but they were listed with a different part number VS the standard drums due to a finer surface finish being required for seating Metallic shoes?
I had been doing a bit of research because a customer recently picked up a 64 metallic brake car which was owned purchased new by a GM engineer, Frank Kostiuk and I was curious. .