1. Sublime69

    Sublime69 Well-Known Member

    Messages:
    296
    Likes Received:
    81
    Joined:
    Feb 22, 2005
    Location:
    Chicago
    Local Time:
    8:22 AM
    I currently have a build 904 in my dart. The trans has a broken band (i think) and I need to pull it out to get it fixed. I also have a 727 in my basement. Is it even worth trying to fix the 904 or should I just build the 727? I would also like to NOT have a manual valve body. I like to just put it in drive and go but open to suggestions. The car has a procharged small block that makes 550hp. Thoughts?
     
  2. roccodart440

    roccodart440 Well-Known Member

    Messages:
    5,966
    Likes Received:
    4941
    Joined:
    Apr 19, 2010
    Local Time:
    9:22 AM
    So long as it can handle the Hp the 904 is ideal.

    Turbo action makes a pro street auto valve body
     
  3. Locomotion

    Locomotion Well-Known Member

    Messages:
    3,229
    Likes Received:
    896
    Joined:
    May 31, 2004
    Location:
    Florida
    Local Time:
    9:22 AM
    If you change from 904 to 727, you'll have to get a shorter driveshaft with a different slip yoke and a different converter and possibly flexplate. 727 is naturally stronger than a 904, but a 904 can handle a lot of HP with basic HD/performance upgrades and will be about .15 faster in the 1/4 mile. 904s also don't have a tendency of blowing up if the sprag goes out.

    The 727 should get upgraded also. A good shift kit or standard forward performance valve body will go a long way to minimize heat, slippage and prolong its life. A cooler is a good idea for any performance application.
     
    • Like Like x 1
    • Agree Agree x 1
    • Sublime69

      Sublime69 Well-Known Member

      Messages:
      296
      Likes Received:
      81
      Joined:
      Feb 22, 2005
      Location:
      Chicago
      Local Time:
      8:22 AM
      I would definitely like to stick with my 904 I just dont know whats is wrong with it now and i want to make sure it can handle the power. I guess I need to find a good trams guy around Chicago to bring it to.
       
      • Agree Agree x 1
      • roccodart440

        roccodart440 Well-Known Member

        Messages:
        5,966
        Likes Received:
        4941
        Joined:
        Apr 19, 2010
        Local Time:
        9:22 AM
        Honestly, if you need a new trans, I'd be looking at this as an opportunity to put some type of OD in your car. Trust me when I tell you once you have an OD it's life changing and you'll never go back .
         
        • Agree Agree x 2
        • Sublime69

          Sublime69 Well-Known Member

          Messages:
          296
          Likes Received:
          81
          Joined:
          Feb 22, 2005
          Location:
          Chicago
          Local Time:
          8:22 AM
          What would you recommend? 518?
           
          Last edited: Jan 9, 2018
          • Like Like x 1
          • roccodart440

            roccodart440 Well-Known Member

            Messages:
            5,966
            Likes Received:
            4941
            Joined:
            Apr 19, 2010
            Local Time:
            9:22 AM
            If you are going to keep your existing transmission, a gear vendors overdrive. That's what I run. If you are going to put a new tranny in there

            If you wanted a new OD transmission I'm not familiar with all the options or what's best but I've read about using a518 or a500 transmissions.
             
          • 65 Dartman

            65 Dartman FABO Gold Member FABO Gold Member

            Messages:
            12,503
            Likes Received:
            4115
            Joined:
            Sep 24, 2006
            Location:
            Strasburg, VA
            Local Time:
            9:22 AM
            FWIW I will be using a mildly beefed up A500 behind a stock 340 in my 47 Dodge project.
             
            • Like Like x 1
            • Thanks! Thanks! x 1
            • 72Dart6pack

              72Dart6pack Harder Better Faster Stronger.

              Messages:
              4,763
              Likes Received:
              5296
              Joined:
              Feb 1, 2016
              Location:
              Roseville Michigan
              Local Time:
              9:22 AM
              904 all the way. Just finished mine last month. I'm running this behind a 408 6 Pack motor.

              IMG_01461.jpg

              20171210_151627.jpg

              20171210_151641.jpg
               
              • Like Like x 2
              • MRGTX

                MRGTX Well-Known Member

                Messages:
                1,950
                Likes Received:
                761
                Joined:
                Sep 24, 2007
                Location:
                CT, USA
                Local Time:
                8:22 AM
                First things first: How do you know it's broken?
                 
              • abodyjoe

                abodyjoe Well-Known Member

                Messages:
                21,971
                Likes Received:
                8381
                Joined:
                May 22, 2004
                Location:
                Berlin,N.J. 08009
                Local Time:
                9:22 AM
                904 all the way. Screw that 727 boat anchor.

                Have the 904 built. Can easily be built to handle your hp. No need for a manual valve body either.

                As far as od goes. gear vendors is probably the easiest way to do it. Not all that cheap and not the best od ratio but a very strong piece that you don’t have to hack your car to put in.

                That a500, 518 and gm200r od units all require you to hack the torsion bar crossmember up. If that’s not a big deal to ya then that me be the way to go for you
                 
                • Agree Agree x 1
                • Sublime69

                  Sublime69 Well-Known Member

                  Messages:
                  296
                  Likes Received:
                  81
                  Joined:
                  Feb 22, 2005
                  Location:
                  Chicago
                  Local Time:
                  8:22 AM
                  After doing a small burnout the trans has had issues. If I put the car in Drive it will just rev and the car will rock about 1/2". I have to put the trans in 1st and manually shift the car to drive it. It also wont take a lot of power. If i give anymore than 1/4 throttle it will not go. It feels like it is slipping or driving through the converter. The fluid looks brand new too.
                   
                • Divenut

                  Divenut Well-Known Member

                  Messages:
                  3,254
                  Likes Received:
                  1668
                  Joined:
                  Sep 22, 2011
                  Location:
                  Naperville Illinois
                  Local Time:
                  8:22 AM
                  Hey Sublime,

                  May want to give this place a call. While I only had them press in some bushings/seals for my 727, the manager Chuck and several of the technicians are old school Mopar guys. Seem like real decent folks, and I'll go there if/when I need trans/rear end work. That said, I suggest you chat with them to see if they may be right for you.

                  And I love your ride!

                  Mr Transmission
                  104 Brook Ct, Bolingbrook, IL 60440
                  (630) 378-5801

                  Be well
                  Pat
                   
                • Sublime69

                  Sublime69 Well-Known Member

                  Messages:
                  296
                  Likes Received:
                  81
                  Joined:
                  Feb 22, 2005
                  Location:
                  Chicago
                  Local Time:
                  8:22 AM
                  Hey, thanks! I will definitely give them a call! I am going to make a post to see if anyone else have recommendations for a trans guy around me too.
                   
                  • Like Like x 1
                  • mopar65

                    mopar65 Well-Known Member

                    Messages:
                    1,805
                    Likes Received:
                    1258
                    Joined:
                    Mar 23, 2008
                    Location:
                    Laquey MO
                    Local Time:
                    8:22 AM
                  • MrJLR

                    MrJLR Built, not bought FABO Gold Member

                    Messages:
                    5,358
                    Likes Received:
                    6036
                    Joined:
                    May 14, 2015
                    Location:
                    Chino, California
                    Local Time:
                    6:22 AM
                    I must have the double whammy of boat anchors. ...a 318/727 - and I LOVE it....

                    Jeff
                     
                  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.