Rubber plugs on '63-'64 drum brakes

[Stuart F.]

Re: Rubber plugs on '63-'64 drum brakes

Whew! Jim. For a minute there I thought you had one drum with four knockouts and I thought, wow! where did mine go wrong.

Just a caution here that I am repeating; be wary of replacement drums that do not have the knockouts, that are generic and don't have the grooves for the anti-chatter springs. I bought some from Eckler's when I did my complete brake overhaul last year (changing from Sintered Metallics to Matrix Ceramics). I was convinced (by my friends) that after 40k miles with Metallics my originals would be junk (not so). At any rate, I could not get the new brakes adjusted right with these replacement drums. I believe there is a dimensional relationship difference between the hub mounting surface and the inner braking surface, i.e. the linings would not seat in the drums, and the drum itself does not seem to fit up to the backing plate properly (close, but no cigar). I finally had to have my originals trued up (they had a minimal amount of taper and out of round, well within limits) and they work great.

Stu Fox

[Harry S.]

Re: Rubber plugs on '63-'64 drum brakes

New, in a box dated 12/63.

[Wayne M.]

Re: Rubber plugs on '63-'64 drum brakes

...What are your casting numbers?

Michael -- on my (probably) late Jan '64 rear suspension (no car), My drum edge casting #s are W8 (on one); W12 (the other); both with number 3828688 (ie. 3 less than Harry's). Any reason for the number difference ? ie. regular versus J65 ?

[Michael H.]

Re: Rubber plugs on '63-'64 drum brakes

Michael -- on my (probably) late Jan '64 rear suspension (no car), My drum edge casting #s are W8 (on one); W12 (the other); both with number 3828688 (ie. 3 less than Harry's). Any reason for the number difference ? ie. regular versus J65 ?

Harry's drum looks like a front, not a rear??

[Jim W.]

Re: Rubber plugs on '63-'64 drum brakes

Yup, that's a correct un-knocked out knockout.

What are your casting numbers?

Michael
I don't have all the #'s from when I took these pics a few years ago, but I do see a W3 and W9 along with #3828688 and 3828671. Mine are metallic.

Stu- Thanks for the heads up. Mine have appx. 43000 miles and look like plenty of life left, so when I get around to restoring I will try to use linings and drums as is to test first.

[Michael H.]

Re: Rubber plugs on '63-'64 drum brakes

Michael
I don't have all the #'s from when I took these pics a few years ago, but I do see a W3 and W9 along with #3828688 and 3828671. Mine are metallic.

Stu- Thanks for the heads up. Mine have appx. 43000 miles and look like plenty of life left, so when I get around to restoring I will try to use linings and drums as is to test first.

Thanks Jim.

[Alan D.]

Re: Rubber plugs on '63-'64 drum brakes

The original J65 drums have a single knock out while the SR (at least rear) have two knock outs, never noticed that before until this thread. Thanks

[Wayne M.]

Re: Rubber plugs on '63-'64 drum brakes

The original J65 drums have a single knock out while the SR (at least rear) have two knock outs, never noticed that before until this thread. Thanks

Alan -- for the rest of us, please define "SR".

[Bob J.]

Re: Rubber plugs on '63-'64 drum brakes

for the rest of us, please define "SR".

SR = service replacement