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No brakes after rear disc swap [NON FESTIVA]

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  • No brakes after rear disc swap [NON FESTIVA]

    I swapped the rear end on my Dakota with a newer model with rear disc brakes. I have the brake lines ran and everything seemed to be fine, and the brakes are all bled to perfection. However, when I try to use the brakes, there's barley anything there. Is there something else I have to do when I do the disc conversion? Everything else in the brake system is stock. Does anybody know what my problem is? Please let me know so I can fix it!

    Thanks everybody,
    Karl G.

  • #2
    Did you replace the master cylinder for a 4 wheel disc unit? The rear calipers use more fluid than wheel cylinders.
    Trees aren't kind to me...

    currently: 2 88Ls (Scrappy and Jersey), 88LX, 90L(Pepe), 91L, 91GL (Skippy) 93 GL Sport (the Mighty Favakk), 94 (Bruce) & 95 Aspire SEs, 97 Aspire (The Joker),
    94 Justy 4WD, 87 Fiero GT, plus 2 parts cars. That's my fleet.

    Comment


    • #3
      No, the only thing that was changed was the rear end, and I attached new brake lines to the rear. I was told I didn't need to change the master (I made sure to ask), is this incorrect?

      Comment


      • #4
        Yes. Your Dakota uses a 15/16" bore and the newer ones use a 1 1/8" bore. You need the extra capacity to fill the rear calipers.
        Trees aren't kind to me...

        currently: 2 88Ls (Scrappy and Jersey), 88LX, 90L(Pepe), 91L, 91GL (Skippy) 93 GL Sport (the Mighty Favakk), 94 (Bruce) & 95 Aspire SEs, 97 Aspire (The Joker),
        94 Justy 4WD, 87 Fiero GT, plus 2 parts cars. That's my fleet.

        Comment


        • #5
          Do you have any idea as to if a newer style master will be a bolt on replacement?

          Comment


          • #6
            No I don't, but it should be easy to figure out at your local mcauto parts store
            Trees aren't kind to me...

            currently: 2 88Ls (Scrappy and Jersey), 88LX, 90L(Pepe), 91L, 91GL (Skippy) 93 GL Sport (the Mighty Favakk), 94 (Bruce) & 95 Aspire SEs, 97 Aspire (The Joker),
            94 Justy 4WD, 87 Fiero GT, plus 2 parts cars. That's my fleet.

            Comment


            • #7
              I was also just told that I would need an adjustable proportioning valve. Is this true?

              Comment


              • #8
                You should use the proportion block from the donor
                Trees aren't kind to me...

                currently: 2 88Ls (Scrappy and Jersey), 88LX, 90L(Pepe), 91L, 91GL (Skippy) 93 GL Sport (the Mighty Favakk), 94 (Bruce) & 95 Aspire SEs, 97 Aspire (The Joker),
                94 Justy 4WD, 87 Fiero GT, plus 2 parts cars. That's my fleet.

                Comment

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