used the site for research but finally joined today. I have a 1966 Pontiac catalina. original brake master cylinder was a single line output. I recently changed to a dual outlet master. car is power brakes and drum/drum. swapped in a master from a 67 catalina with power brakes drum/drum. (a1cardone 1-1328 1" bore). normal stopping brakes fine, panic stop the pedal hard and will not lock wheels(maybe a slight chirp from rear). any ideas? normally I would switch to a smaller bore but its already 1". im positive there is no air in the system, or leaks. bad reman?
not new but lots or material. drums are within spec and shoe contact is consistent across the friction material. and properly adjusted. it stopped great before. that's why i'm thinking just a bad remanufacture.
Same thing happened with an OT car I had, at the time a kit for the MC was $32.00 and a rebuilt MC was $28.00...heck, couldn't beat the idea of buying one ready to run...wound up taking the MC back, got a kit for my old one, worked fine. Ever since then,anytime I buy a new or rebuilt MC's and WC's, I take them apart and clean them out...a few have had shavings and debris in them...overseas QC I guess...
1966 off topic car This forum gets so many brake questions that we need a separate sub-forum for brakes
Hmmm. I did the same thing to my Cad. But I changed out the shoes and drums at the same time, and it did the same thing. Pretty quickly after driving a bit, the shoes seated and it went back to normal. But yours sounds like it's definately the MC. Interesting. Sent from my iPhone using The H.A.M.B. mobile app
agreed, there is not a lot of options for discussion sections. but clunker I was thinking the same. gonna try to find a new one instead of a reman. :blues4u holds vacuum.
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