8 3/4 rear disc swap - ford ranger/explorer

Brakes for your Classic Mopar

  1. piz1975

    piz1975 Member

    Messages:
    7
    Likes Received:
    5
    Joined:
    Jan 18, 2011
    Location:
    Cincinnati
    Local Time:
    3:26 PM
    Just trying to see if anyone has heard of this. I read somewhere that you can use a rear disc setup from a new Ford ranger/explorer and they will bolt on (with slight modifications) to the 8 3/4 housings. Trying to keep the cost down on putting rear disc on my 72 Duster
     
  2. tubbedamx

    tubbedamx Location Boise, Idaho

    Messages:
    610
    Likes Received:
    80
    Joined:
    Jan 7, 2007
    Location:
    Boise, Idaho
    Local Time:
    1:26 PM
    I used a 1998 Jeep Cherokee. Only one hole needs to be drilled
     
    • Like Like x 3
    • Thanks! Thanks! x 1
    • halfafish

      halfafish Damn those rabbits, and their holes! FABO Gold Member

      Messages:
      1,810
      Likes Received:
      1592
      Joined:
      Aug 14, 2016
      Location:
      SW Washington
      Local Time:
      12:26 PM
      Agreed. I got a set of rear discs off an early 90's Grand Cherokee 8-1/4 rear end. One hole has to be drilled for the mounting bolts (it only has four holes), and if my measurements are correct, the center hub hole may need to be opened up a bit. Easy stuff.
       
      • Like Like x 1
      • Kendog 170

        Kendog 170 Let the boy go !

        Messages:
        1,359
        Likes Received:
        878
        Joined:
        Mar 10, 2016
        Location:
        Tewksbury Ma.
        Local Time:
        3:26 PM
        What bolt pattern on conversion? 4" or 4.5"
        Also curious what you did for the E brake.
        Thanks
         
      • dodgedifferent2

        dodgedifferent2 Well-Known Member

        Messages:
        2,586
        Likes Received:
        377
        Joined:
        Aug 8, 2008
        Location:
        southwestern, Ontario
        Local Time:
        2:26 PM
      • halfafish

        halfafish Damn those rabbits, and their holes! FABO Gold Member

        Messages:
        1,810
        Likes Received:
        1592
        Joined:
        Aug 14, 2016
        Location:
        SW Washington
        Local Time:
        12:26 PM
        The bolt pattern is 4.5". I haven't hooked them up yet, but the e-brakes will take some finagling. Drums use a ball on the end of the cable, discs use an eyelet. I will have to figure this out when I get there...
         
        • Disagree Disagree x 1
        • piz1975

          piz1975 Member

          Messages:
          7
          Likes Received:
          5
          Joined:
          Jan 18, 2011
          Location:
          Cincinnati
          Local Time:
          3:26 PM
          Yeah, that sounds like easy stuff - not really worried about e-brake, car is going to be a drag/street car with a 4 speed …. 1st gear parking brake LOL
           
        • Johnny Mac

          Johnny Mac www.blueprintengines.com FABO Vendor

          Messages:
          3,687
          Likes Received:
          2784
          Joined:
          Jul 10, 2010
          Location:
          OHIO
          Local Time:
          3:26 PM
          Can I hear more about this please and thank you!
          I'm on rock auto looking at grand cherokee rear calipers...and i'm missing how the 5 bolt pattern on the 8 3/4 axle flange is going to mate to the 2 bolt caliper bracket....or did you make a mounting bracket?
           
        • dodgedifferent2

          dodgedifferent2 Well-Known Member

          Messages:
          2,586
          Likes Received:
          377
          Joined:
          Aug 8, 2008
          Location:
          southwestern, Ontario
          Local Time:
          2:26 PM
          Can also use mustang calipers with internal parking brake.
          Plus the mustang rotors.
           
        • halfafish

          halfafish Damn those rabbits, and their holes! FABO Gold Member

          Messages:
          1,810
          Likes Received:
          1592
          Joined:
          Aug 14, 2016
          Location:
          SW Washington
          Local Time:
          12:26 PM
          The"backing plate" is all one piece, which contains the caliper mounting bracket. The first photo shows where you have to drill the 5th hole. The second photo shows the different kind of emergency brake cable. On regular drum brakes, there is a ball on the end of the cable. On this setup, it's a squared eyelet that goes over a hook. I haven't figured out how to deal with the e-brake cables yet, mine were cut off. I think I'm going to go to the junkyard and scrounge up a set of cables, then figure out how to hook them up.

          rear disc 1.jpg

          rear disc 2.jpg
           
          • Thanks! Thanks! x 2
          • Like Like x 1
          • Agree Agree x 1
          • Kendog 170

            Kendog 170 Let the boy go !

            Messages:
            1,359
            Likes Received:
            878
            Joined:
            Mar 10, 2016
            Location:
            Tewksbury Ma.
            Local Time:
            3:26 PM
          • halfafish

            halfafish Damn those rabbits, and their holes! FABO Gold Member

            Messages:
            1,810
            Likes Received:
            1592
            Joined:
            Aug 14, 2016
            Location:
            SW Washington
            Local Time:
            12:26 PM
            Thanks for the link, and you're right. For maybe $30 or so shipped, new cables!
             
          • TrailBeast

            TrailBeast AKA Mopars4us on Youtube

            Messages:
            21,431
            Likes Received:
            9042
            Joined:
            Mar 11, 2011
            Location:
            Arizona
            Local Time:
            12:26 PM
            Also keep in mind you will probably need new longer wheel studs when adding discs.
             
          • pishta

            pishta I know I'm right....

            Messages:
            18,305
            Likes Received:
            7793
            Joined:
            Oct 13, 2004
            Location:
            Tustin, CA
            Local Time:
            12:26 PM
            do you even need the 5th hole drilled?
             
          • Johnny Mac

            Johnny Mac www.blueprintengines.com FABO Vendor

            Messages:
            3,687
            Likes Received:
            2784
            Joined:
            Jul 10, 2010
            Location:
            OHIO
            Local Time:
            3:26 PM
            That's very helpful, thank you!. Did you have to modify anything beyond wheel studs? Like opening the Center bore? Or you just drill the missing hole and done? Went on like stock? (Not worried about e brake)
             
          • YY1

            YY1 Well-Known Member

            Messages:
            7,035
            Likes Received:
            2733
            Joined:
            Oct 11, 2011
            Location:
            FL
            Local Time:
            3:26 PM
            Curious as to what the other end of the e brake cable actuator pivot does.
             
          • Kendog 170

            Kendog 170 Let the boy go !

            Messages:
            1,359
            Likes Received:
            878
            Joined:
            Mar 10, 2016
            Location:
            Tewksbury Ma.
            Local Time:
            3:26 PM
            Good Point ! E brake may have drum set up inside the rotor like GM's have. If so, could it be incorporated?
            rear-disc-2-jpg.jpg
             
          • Kendog 170

            Kendog 170 Let the boy go !

            Messages:
            1,359
            Likes Received:
            878
            Joined:
            Mar 10, 2016
            Location:
            Tewksbury Ma.
            Local Time:
            3:26 PM
            Look's like you should be grabbing backing plates and e brake set up as well.
            2009-07-07_160502_1998_jeep_gc_park_brk.gif
             
          • Kendog 170

            Kendog 170 Let the boy go !

            Messages:
            1,359
            Likes Received:
            878
            Joined:
            Mar 10, 2016
            Location:
            Tewksbury Ma.
            Local Time:
            3:26 PM
          • Johnny Mac

            Johnny Mac www.blueprintengines.com FABO Vendor

            Messages:
            3,687
            Likes Received:
            2784
            Joined:
            Jul 10, 2010
            Location:
            OHIO
            Local Time:
            3:26 PM
            • Like Like x 1
            • rumblefish360

              rumblefish360 So close, yet so far away FABO Gold Member

              Messages:
              39,068
              Likes Received:
              10623
              Joined:
              Jun 21, 2005
              Location:
              New York, on a Island
              Local Time:
              3:26 PM
              How’s material is that kind from. There will be a time pads wear out. Even caliper replacement.... just got incase......
               
            • halfafish

              halfafish Damn those rabbits, and their holes! FABO Gold Member

              Messages:
              1,810
              Likes Received:
              1592
              Joined:
              Aug 14, 2016
              Location:
              SW Washington
              Local Time:
              12:26 PM
              Looking at my brakes, I believe this to be true. It's an all-in-one deal.

              Here's what the inside of the rotor looks like. I can't get a better photo without pulling the calipers off so I can get the rotor off, but this shows the innards. It looks like the diagram in post #18, more or less. The lever pushes the shoes out against the inside of the rotor's drum area.

              100_2130.JPG
               
              • Thanks! Thanks! x 1
              • Kendog 170

                Kendog 170 Let the boy go !

                Messages:
                1,359
                Likes Received:
                878
                Joined:
                Mar 10, 2016
                Location:
                Tewksbury Ma.
                Local Time:
                3:26 PM
                I agree , I posted the crown package as a reference to what's behind the rotor. Speedway is priced well. I like the Cherokee idea to save the $$$ .
                 
              • Kendog 170

                Kendog 170 Let the boy go !

                Messages:
                1,359
                Likes Received:
                878
                Joined:
                Mar 10, 2016
                Location:
                Tewksbury Ma.
                Local Time:
                3:26 PM
                Oh, new rotors from RA are $16 ea Plus Crown kit $240 and pads is around $300. Different alternative and no add on brackets.
                 
              • 340six

                340six Well-Known Member

                Messages:
                71
                Likes Received:
                2
                Joined:
                Jan 4, 2009
                Local Time:
                2:26 PM
                What rotors and calipers did you buy
                 
              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.