1970 GS 455 Drum Brake Master Cylinder Part Number

Discussion in 'The Bench' started by Brett Slater, Dec 8, 2018.

  1. Brett Slater

    Brett Slater Super Moderator Staff Member

    It was never changed during the time the previous owner had it.
     
  2. CJay

    CJay Supercar owner Staff Member

    One way to verify- get a razor blade, scrape the machined pad and get the code
     
    Brett Slater likes this.
  3. Daves69

    Daves69 Too many cars too work on

    I would be willing to bet it was changed. Every original master I have seen had bleeders and a code stamped in the boss.
    To my knowledge there are no reproduction drum brake master cylinders with bleeders.
     
    dl7265 likes this.
  4. Brett Slater

    Brett Slater Super Moderator Staff Member

    48 years of sludge and paint scraped away with a razor blade and what do you know???

    20181209_190151.jpg
     
    BYoung likes this.
  5. CJay

    CJay Supercar owner Staff Member

    So its an original master, just not for your car. It was probably a rebuilt unit from God knows when. Code CT is 68/69?
     
  6. Brett Slater

    Brett Slater Super Moderator Staff Member

    I have no idea. Haha!
     
  7. CJay

    CJay Supercar owner Staff Member

    CT is coming back to a Camaro/ Firebird application
     
  8. Brett Slater

    Brett Slater Super Moderator Staff Member

    Interesting.
     
  9. copperheadgs1

    copperheadgs1 copperheadgs1

    You guys have power brakes on the brain. I can solve this mystery. Power brakes had bleeders manual masters did not. Diagrams are in the assembly manual. He may have the correct one?
     
    Brett Slater likes this.
  10. copperheadgs1

    copperheadgs1 copperheadgs1

    He has a CT!!!!
     
    Brett Slater likes this.
  11. copperheadgs1

    copperheadgs1 copperheadgs1

    C04E1942-DC24-4F83-BB33-6477D489E927.jpeg No bleeders shown on manual
     
  12. copperheadgs1

    copperheadgs1 copperheadgs1

    I have it from a good source Brett did some dumpster diving tonight! Watch it Brett, you may have some competition. I saw on news some bears have been dumpster diving fattening up for hibernation. Really.
     
    Brett Slater likes this.
  13. 70staged

    70staged Well-Known Member

    Where would you buy the best rebuild kit for this?
     
  14. CJay

    CJay Supercar owner Staff Member

    Im confused. Unless Im reading it wrong, which could very well be, the assembly manual shows three codes for masters- UA, TH and RK.
     
  15. Brett Slater

    Brett Slater Super Moderator Staff Member

    That makes two of us. Haha!

    20180902_101041.jpg
     
  16. dl7265

    dl7265 No car then Mopar

    isn't disc EA and drum ( power at least) CT ? never seen those other codes.
    Brett is your car Manual Drum originally ?
     
  17. dl7265

    dl7265 No car then Mopar

    Brett,do you have that full page scanned ? I can't even read the text on mine.
     
  18. Redmanf1

    Redmanf1 Gold Level Contributor

    The tag code and the stamp code are not always the same. 70 power Disc stamp is EA as DL posted but I do not think drum.
     
    mrolds69 likes this.
  19. Brett Slater

    Brett Slater Super Moderator Staff Member

    Original manual drum car, yes.

    I don't have it scanned - it's a recent copy.
     
  20. CJay

    CJay Supercar owner Staff Member

    Post #10
     

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