Where do i post this question?

Brakes for your Classic Mopar

  1. Swan Song

    Swan Song Active Member

    Messages:
    42
    Likes Received:
    23
    Joined:
    Sep 25, 2014
    Location:
    Arkansas
    Local Time:
    11:28 AM
    Guys,

    I need help.
    I own a 1971 dart that I am putting disk brake conversion kit on. I am having trouble with the rear end. I guess my car has an 8.25 rear end with small pattern lugs and the brakes wont fit it. I need either an 8.75 or Dana to make it work. According to Summit tech support, they do not make a kit for the 8.25 rear end.

    So either I shell out big money for the rear end needed or I have mismatch rims. wtf.


    Can someone help me figure out what to do. Those rear ends don't grow on trees these days and i am not rich.

    Thanks in advance.
     
  2. pishta

    pishta I know I'm right....

    Messages:
    21,427
    Likes Received:
    10808
    Joined:
    Oct 13, 2004
    Location:
    Tustin, CA
    Local Time:
    8:28 AM
    Tell us what disk conversion you have.
     
  3. Car Nut

    Car Nut Mopar Master

    Messages:
    8,211
    Likes Received:
    53005
    Joined:
    Dec 28, 2018
    Location:
    Trump Train
    Local Time:
    9:28 AM
    Contact Cass at Dr. Diff if anybody can help he can. Unless you’re looking to upgrade your rear end, I would send those back.

    Brakes :: Kits and Assemblies
     
    • Agree Agree x 1
    • mopar head

      mopar head Well-Known Member

      Messages:
      3,321
      Likes Received:
      1299
      Joined:
      Oct 21, 2008
      Location:
      Right here, can`t you see me?
      Local Time:
      11:28 AM
      Click on forums and you can start again in the brake section. Or let it ride here.
       
    • pishta

      pishta I know I'm right....

      Messages:
      21,427
      Likes Received:
      10808
      Joined:
      Oct 13, 2004
      Location:
      Tustin, CA
      Local Time:
      8:28 AM
      Custom axles are cheaper than a whole rear end.
       
    • Swan Song

      Swan Song Active Member

      Messages:
      42
      Likes Received:
      23
      Joined:
      Sep 25, 2014
      Location:
      Arkansas
      Local Time:
      11:28 AM
    • Swan Song

      Swan Song Active Member

      Messages:
      42
      Likes Received:
      23
      Joined:
      Sep 25, 2014
      Location:
      Arkansas
      Local Time:
      11:28 AM
      Tech support at Summit says nobody makes a kit for the 8.25 rear end cause they were junk.
       
    • Car Nut

      Car Nut Mopar Master

      Messages:
      8,211
      Likes Received:
      53005
      Joined:
      Dec 28, 2018
      Location:
      Trump Train
      Local Time:
      9:28 AM
      Tech support here is the best.
       
    • Car Nut

      Car Nut Mopar Master

      Messages:
      8,211
      Likes Received:
      53005
      Joined:
      Dec 28, 2018
      Location:
      Trump Train
      Local Time:
      9:28 AM
    • pishta

      pishta I know I'm right....

      Messages:
      21,427
      Likes Received:
      10808
      Joined:
      Oct 13, 2004
      Location:
      Tustin, CA
      Local Time:
      8:28 AM
      • Like Like x 1
      • moparmat2000

        moparmat2000 FABO Gold Member FABO Gold Member

        Messages:
        20,170
        Likes Received:
        9497
        Joined:
        May 13, 2010
        Location:
        Grand Tetons
        Local Time:
        10:28 AM
        I have never seen an 8.25 with SBP axles. I was under the impression the 8.25 started in 1973 and was BBP. BTW, the jeep cherokee disc setup looks a lit like the ford explorer setup. A company called www.bruinbrakecables.com can custom make you brake cables with whatever ends on them that you need. They made me brake cables that were mopar in the front, and ford explorer in the back

        20180910_174433.jpg

        20180910_174348.jpg

        20180910_174346.jpg
         
        • Like Like x 1
        • Ironracer

          Ironracer Gearhead

          Messages:
          2,642
          Likes Received:
          1839
          Joined:
          May 8, 2020
          Location:
          Tampa Bay Florida
          Local Time:
          11:28 AM
          Mam, that's cool!
           
        • moparmat2000

          moparmat2000 FABO Gold Member FABO Gold Member

          Messages:
          20,170
          Likes Received:
          9497
          Joined:
          May 13, 2010
          Location:
          Grand Tetons
          Local Time:
          10:28 AM
          Thank you. I think they say these are good till 20,000 psi pulling force on them before failure
           
        • motorpirate

          motorpirate serial mopar owner

          Messages:
          620
          Likes Received:
          437
          Joined:
          Nov 4, 2007
          Location:
          northern KY
          Local Time:
          10:28 AM
          I tried to get them to do some early A cables for about a month by phone and email, never could get them to follow thru...
           
        • MoparLeo

          MoparLeo NRA BENEFACTOR LEVEL LIFE MEMBER FABO Gold Member

          Messages:
          967
          Likes Received:
          680
          Joined:
          Feb 10, 2016
          Location:
          Moreno Valley, Cal. So. Cal.
          Local Time:
          8:28 AM
          This info is a little dated pre 2000
          8 ¼
          Introduced in 1969. This rear end will be found in all Darts / Valients from 73 - 76 and also can be found in 340 Dusters and other A bodies. There is a sure -grip available beginning in 1973. This axle while not a real high performance piece is certainly good enough for a mild street car. So if you go for a disk brake swap and are pulling out those spindles etc. out of your 73-76 donor car just grab the rear and you will have a nice 4.5" wheel pattern all around and way better brakes to boot. Sure-grip units are commonly found in Diplomat cop cars throughout the 80's but that rear end is a bit harder to install than the 73 -76 due to the strange leaf spring mounting pads. These pads can be cut off the axle and replaced with more conventional ones if you wish. If your short on cash and you can't afford to get a 8 ¾ or find the time to locate the long 8 ¾ axles for re-splining the 8 1/4 is a real nice alternative for a while and CHEAP in the yards ($50.00 non sure-grip and $125.00 sure-grip here in Texas). You may never blow up the 8 1/4 with a mild small block street car.
          Castings: 2852905, 3723598, 3723599
          Info: 1 5/8 pinion, 57.6" wide, 10 bolt cover, 55.6" width (flange to flange) / 51.4 housing flange to flange / 43.02 spring seat center to center.
           
          • Like Like x 1
          • Fawkes

            Fawkes Well-Known Member

            Messages:
            71
            Likes Received:
            54
            Joined:
            Sep 3, 2020
            Location:
            Arkansas
            Local Time:
            10:28 AM
            8.25" is a great rearend. Sounds like you probably have a 7.25"
             
          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.