Brand new Centric drums don't fit?

Brakes for your Classic Mopar

  1. 65Val

    65Val Average Length Member

    Messages:
    5,311
    Likes Received:
    1254
    Joined:
    Oct 14, 2005
    Location:
    Victoria, BC, Canada, EH!
    Local Time:
    3:04 AM
    Anyone heard that the new Centric SBP brake drums "lock up" the rear end when tightened down? I was talking with a gent on the FB "Early Valiant and Barracuda "page. He has a problem of new Centric SBP brake drums "locking against the backing plate when tightened down" on his '65 Barracuda's 7.25 rear end. Apparently, he's tried several sets, with the same result. He says the rear end is totally stock.

    Anyone heard of this?
     
  2. mopar head

    mopar head Well-Known Member

    Messages:
    3,210
    Likes Received:
    1106
    Joined:
    Oct 21, 2008
    Location:
    Right here, can`t you see me?
    Local Time:
    6:04 AM
    China say, close enough, for you capitalist pig!:soapbox:You make work!
     
    • Agree Agree x 2
    • Like Like x 1
    • 67Dart273

      67Dart273 FABO Gold Member FABO Gold Member

      Messages:
      50,825
      Likes Received:
      19510
      Joined:
      Oct 14, 2010
      Location:
      Idaho
      Local Time:
      3:04 AM
      Too bad everybody junked their disk/ drum lathes. Would be a simple matter to turn some off the rear lip
       
      • Agree Agree x 4
      • 65Val

        65Val Average Length Member

        Messages:
        5,311
        Likes Received:
        1254
        Joined:
        Oct 14, 2005
        Location:
        Victoria, BC, Canada, EH!
        Local Time:
        3:04 AM
        These drums worked fine on my 67 7 1/4 without any modification at all. Why would they have to be modified now?
         
      • Dana67Dart

        Dana67Dart The parts you don't add don't cause you no trouble FABO Gold Member

        Messages:
        7,462
        Likes Received:
        5102
        Joined:
        Jul 16, 2017
        Location:
        Northern Colorado
        Local Time:
        4:04 AM
        Are your backing plates correct for the application?

        10 x 1.75 vs 10x2
        SBP VS BBP
         
        • Like Like x 2
        • SGBARRACUDA

          SGBARRACUDA ROY FABO Gold Member

          Messages:
          21,388
          Likes Received:
          9631
          Joined:
          Dec 7, 2006
          Location:
          PLANT CITY FL. and PERRY GA.
          Local Time:
          6:04 AM
          I still have my Ammco
          i still have my Ammco 4000 drum/rotor lathe with all the tooling.
           
          • Like Like x 1
          • 67Dart273

            67Dart273 FABO Gold Member FABO Gold Member

            Messages:
            50,825
            Likes Received:
            19510
            Joined:
            Oct 14, 2010
            Location:
            Idaho
            Local Time:
            3:04 AM
            So do I. The disk gearbox has a problem, you must hold it in gear, but I don't use it much
             
            • Disagree Disagree x 1
            • SGBARRACUDA

              SGBARRACUDA ROY FABO Gold Member

              Messages:
              21,388
              Likes Received:
              9631
              Joined:
              Dec 7, 2006
              Location:
              PLANT CITY FL. and PERRY GA.
              Local Time:
              6:04 AM
              That would be a PITA on the slow cut.
               
            • 65Val

              65Val Average Length Member

              Messages:
              5,311
              Likes Received:
              1254
              Joined:
              Oct 14, 2005
              Location:
              Victoria, BC, Canada, EH!
              Local Time:
              3:04 AM
              I’ve asked him that… no reply yet.
               
            • Dana67Dart

              Dana67Dart The parts you don't add don't cause you no trouble FABO Gold Member

              Messages:
              7,462
              Likes Received:
              5102
              Joined:
              Jul 16, 2017
              Location:
              Northern Colorado
              Local Time:
              4:04 AM
              What is the part number ordered?
               
              • Agree Agree x 1
              • 67Dart273

                67Dart273 FABO Gold Member FABO Gold Member

                Messages:
                50,825
                Likes Received:
                19510
                Joined:
                Oct 14, 2010
                Location:
                Idaho
                Local Time:
                3:04 AM
                Why are you asking me? I did not manufacture either the drums nor the rear axle or any parts of
                 
              • 65Val

                65Val Average Length Member

                Messages:
                5,311
                Likes Received:
                1254
                Joined:
                Oct 14, 2005
                Location:
                Victoria, BC, Canada, EH!
                Local Time:
                3:04 AM
                Because you were the first to suggest they needed modifying, so I thought you could tell me why, when they work fine on my car.
                 
              • Dana67Dart

                Dana67Dart The parts you don't add don't cause you no trouble FABO Gold Member

                Messages:
                7,462
                Likes Received:
                5102
                Joined:
                Jul 16, 2017
                Location:
                Northern Colorado
                Local Time:
                4:04 AM
                Quick look couldn't find 10x1.75 rear drums anywhere.

                Anyone else?
                 
              • cudamark

                cudamark FABO Gold Member FABO Gold Member

                Messages:
                8,958
                Likes Received:
                1437
                Joined:
                Mar 14, 2009
                Location:
                San Diego
                Local Time:
                3:04 AM
                You haven't stated the size of the brakes and the part number being used, but, it's possible he got front drums instead of rears. Fronts are wider and would hit the backing plate if tightened down. A simple measurement comparing the old drums to the new ones should tell the tale.
                 
                • Like Like x 1
                • 65Val

                  65Val Average Length Member

                  Messages:
                  5,311
                  Likes Received:
                  1254
                  Joined:
                  Oct 14, 2005
                  Location:
                  Victoria, BC, Canada, EH!
                  Local Time:
                  3:04 AM
                  I’ve asked him to measure the width of his new drums…awaiting answer.

                  Not sure how to post the whole convo from FB, but here’s where it is, if you want to check it out…

                  6B7E3B72-253B-4E9C-A443-D4DD181F01F5.png
                   
                  • Like Like x 1
                  • RustyRatRod

                    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

                    Messages:
                    77,979
                    Likes Received:
                    55492
                    Joined:
                    Jun 7, 2010
                    Location:
                    Georgia
                    Local Time:
                    6:04 AM
                    You have the drums. You have the car and the rear end they fit on. You have everything there in front of you at your disposal to see why they don't fit correctly. It sounds like Del said, they simply need some of that inner lip trimmed back.
                     
                  • 65Val

                    65Val Average Length Member

                    Messages:
                    5,311
                    Likes Received:
                    1254
                    Joined:
                    Oct 14, 2005
                    Location:
                    Victoria, BC, Canada, EH!
                    Local Time:
                    3:04 AM
                    Rusty… not my car… its a guy on FB that s having the problem.., Im just trying to help him out.Read up there^^^^^^
                     
                    • Like Like x 1
                    • RustyRatRod

                      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

                      Messages:
                      77,979
                      Likes Received:
                      55492
                      Joined:
                      Jun 7, 2010
                      Location:
                      Georgia
                      Local Time:
                      6:04 AM
                      Oh so you're not having the problem? Piss on it, then. LOL
                       
                    • 65Val

                      65Val Average Length Member

                      Messages:
                      5,311
                      Likes Received:
                      1254
                      Joined:
                      Oct 14, 2005
                      Location:
                      Victoria, BC, Canada, EH!
                      Local Time:
                      3:04 AM
                      No, but trying to help….isnt that why were here, and there?
                       
                      Last edited: Aug 6, 2021
                      • Agree Agree x 2
                      • Like Like x 1
                      • Dana67Dart

                        Dana67Dart The parts you don't add don't cause you no trouble FABO Gold Member

                        Messages:
                        7,462
                        Likes Received:
                        5102
                        Joined:
                        Jul 16, 2017
                        Location:
                        Northern Colorado
                        Local Time:
                        4:04 AM
                        Open your kids collage fund!

                        This is for 10x1.75 SBP Rear drums 7 1/4 or 8 3/4.
                        Screenshot_20210806-171340.png


                        oem part numbers
                        2534757 - 3004743 - 3580551 Screenshot_20210806-170959.png
                         
                      • furyus2

                        furyus2 Well-Known Member

                        Messages:
                        2,259
                        Likes Received:
                        740
                        Joined:
                        Oct 30, 2010
                        Location:
                        weeki wachee fl
                        Local Time:
                        6:04 AM
                        I had this same problem on my Dart. Its not the backing plates. It's china junk. I had a machinist buddy cut 1/4 inch off the edge, and the little flange on the drum needs cutting back also. Check your measurements though. It's been a while since I did this.
                         
                        • Like Like x 1
                        • furyus2

                          furyus2 Well-Known Member

                          Messages:
                          2,259
                          Likes Received:
                          740
                          Joined:
                          Oct 30, 2010
                          Location:
                          weeki wachee fl
                          Local Time:
                          6:04 AM
                          I would also have a clean up cut done on the drums braking surface. Mine were making all kinds of racket, until I had them turned.
                           
                          • Like Like x 1
                          • 65Val

                            65Val Average Length Member

                            Messages:
                            5,311
                            Likes Received:
                            1254
                            Joined:
                            Oct 14, 2005
                            Location:
                            Victoria, BC, Canada, EH!
                            Local Time:
                            3:04 AM
                            Funny thing… they went right on my 7.25, and later 8.75 in my Dart with no mods at all.
                             
                          • furyus2

                            furyus2 Well-Known Member

                            Messages:
                            2,259
                            Likes Received:
                            740
                            Joined:
                            Oct 30, 2010
                            Location:
                            weeki wachee fl
                            Local Time:
                            6:04 AM
                            Well, who knows what the chinese are thinking when they make their junk.
                             
                          • 65Val

                            65Val Average Length Member

                            Messages:
                            5,311
                            Likes Received:
                            1254
                            Joined:
                            Oct 14, 2005
                            Location:
                            Victoria, BC, Canada, EH!
                            Local Time:
                            3:04 AM
                            I’m just happy they’re available for SBP. Seems “the big guys” have abandoned us A body peeps.
                             
                            • Like Like x 1
                            1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                              By continuing to use this site, you are consenting to our use of cookies.