1. FlDart360

    FlDart360 Well-Known Member

    Messages:
    199
    Likes Received:
    101
    Joined:
    May 30, 2016
    Location:
    FL ,Zero Elevation
    Local Time:
    2:08 PM
    Since I have never owned a car with this engine transmission combo I wasn’t sure if there is room for improvement here. Driving at 60mph should I expect a downshift from my 727 if I give it wide open throttle? My rear gear is 3:55 and I’m using an aftermarket Lokar shift cable. The car shifts ok under normal acceleration. My RPM at 60 is about 2800. Could I have missed something when installing the Lokar or is this to high of a speed to expect it to jump to second gear?

    Thanks to all on this form for the help you have provided. It would be a long road without the information available here.
     
  2. 66fyssh

    66fyssh Don't Stop Believin' FABO Gold Member

    Messages:
    5,984
    Likes Received:
    5354
    Joined:
    Jun 22, 2013
    Location:
    Northwest GA
    Local Time:
    2:08 PM
    What year is your transmission? Early transmissions didn't have a part throttle Kickdown. I think it changed in 1968? I'll have to pull out my book.
     
    • Agree Agree x 1
    • d1970

      d1970 TODAY IS A GOOD DAY TO HAVE A GOOD DAY

      Messages:
      375
      Likes Received:
      172
      Joined:
      Sep 29, 2015
      Location:
      Ontario, Canada
      Local Time:
      1:08 PM
      I believe 1971 was the first year for part throttle kickdown in the V8
       
      • Agree Agree x 2
      • RustyRatRod

        RustyRatRod I didn't do it. FABO Gold Member

        Messages:
        69,112
        Likes Received:
        43568
        Joined:
        Jun 7, 2010
        Location:
        Georgia
        Local Time:
        2:08 PM
        Indeed, if it does not have the part throttle kickdown valve assembly, it will not down shift. That's a nice upgrade to do to one and it's not difficult to do.
         
        • Agree Agree x 2
        • FlDart360

          FlDart360 Well-Known Member

          Messages:
          199
          Likes Received:
          101
          Joined:
          May 30, 2016
          Location:
          FL ,Zero Elevation
          Local Time:
          2:08 PM

          Being the second owner of the car very little was passed on from the previous own. Here are some numbers i found on the tail shaft area of the transmission maybe they might help 4006830-3602 .
           
        • RustyRatRod

          RustyRatRod I didn't do it. FABO Gold Member

          Messages:
          69,112
          Likes Received:
          43568
          Joined:
          Jun 7, 2010
          Location:
          Georgia
          Local Time:
          2:08 PM
          The numbers you're looking for are on the side of the pan rail. I forget which side......just get them ALL and post them and one of these guys will decipher it for you.
           
        • FlDart360

          FlDart360 Well-Known Member

          Messages:
          199
          Likes Received:
          101
          Joined:
          May 30, 2016
          Location:
          FL ,Zero Elevation
          Local Time:
          2:08 PM

          The P O also told me that it has a cheetah kit. When i put it in drive it shifts hard going thru the gears but it does so on its own it's not a manual valve body or reverse pattern. Figured i should have mentioned this also.
           
        • RustyRatRod

          RustyRatRod I didn't do it. FABO Gold Member

          Messages:
          69,112
          Likes Received:
          43568
          Joined:
          Jun 7, 2010
          Location:
          Georgia
          Local Time:
          2:08 PM
          That won't have anything to do with the down shift, I don't believe. Find those numbers and we'll know for sure.
           
        • FlDart360

          FlDart360 Well-Known Member

          Messages:
          199
          Likes Received:
          101
          Joined:
          May 30, 2016
          Location:
          FL ,Zero Elevation
          Local Time:
          2:08 PM

          Ok let me go investigate the Pan rail and i will post my findings thanks Rusty.
           
          Last edited: Aug 16, 2020
        • 66fyssh

          66fyssh Don't Stop Believin' FABO Gold Member

          Messages:
          5,984
          Likes Received:
          5354
          Joined:
          Jun 22, 2013
          Location:
          Northwest GA
          Local Time:
          2:08 PM
          Numbers should be on the driver's side pan rail, just above where the pan bolts on and below where the lines connect.
           
          • Agree Agree x 1
          • TrailBeast

            TrailBeast AKA Mopars4us on Youtube

            Messages:
            21,486
            Likes Received:
            9166
            Joined:
            Mar 11, 2011
            Location:
            Arizona
            Local Time:
            12:08 PM
            I seriously doubt you would get a downshift at 60 anyway unless you set your TP so high it would be annoying around town.
             
          • d1970

            d1970 TODAY IS A GOOD DAY TO HAVE A GOOD DAY

            Messages:
            375
            Likes Received:
            172
            Joined:
            Sep 29, 2015
            Location:
            Ontario, Canada
            Local Time:
            1:08 PM
            I talked to Tracy (fishy68) about this a while back, I had a 68 727 transmission, 3.91 gears that would shift at 4500 rpm at WOT. He said If it shifts into each gear at a very low rpm such as 4000-4500 the governor won't let it downshift at very high speeds. You can remedy this by installing a higher RPM governor set that A&A sells. That's the problem. If it shifts at 4500 at WOT it won't have much for kickdown down the road. I'd pick the governor that's closest to the rpm your engines power peaks at. He also talked about adding a part throttle kickdown and he usually puts them on every Mopar transmission he does.
             
          • d1970

            d1970 TODAY IS A GOOD DAY TO HAVE A GOOD DAY

            Messages:
            375
            Likes Received:
            172
            Joined:
            Sep 29, 2015
            Location:
            Ontario, Canada
            Local Time:
            1:08 PM
            I just remembered he had me change the 1-2 shift spring to so it would shift at the 5400 rpm governor I installed. So now both 1-2 shift and the 2-3 shift points are the same 5400 rpm at WOT. If you do not change the 1-2 shift spring, the 1-2 comes in lower than the 2-3 shift at 5400 rpm at WOT. I now have kickdown at 65-70 and down at WOT.
             
            Last edited: Aug 16, 2020
          • CudaFactHackJob

            CudaFactHackJob FABO Gold Member FABO Gold Member

            Messages:
            1,571
            Likes Received:
            587
            Joined:
            Mar 17, 2016
            Location:
            Hemet, Ca.
            Local Time:
            1:08 PM
            You can't go by the numbers cuz parts get switched thru the years.
             
          • FlDart360

            FlDart360 Well-Known Member

            Messages:
            199
            Likes Received:
            101
            Joined:
            May 30, 2016
            Location:
            FL ,Zero Elevation
            Local Time:
            2:08 PM
            Well I have been rained out on my attempt to get under the car. My garage is tied up with another project so my only option was the driveway and Mother Nature put an end to that. Maybe it will die down in a bit.
             
          • oldkimmer

            oldkimmer FABO Gold Member FABO Gold Member

            Messages:
            18,181
            Likes Received:
            5801
            Joined:
            Nov 11, 2006
            Location:
            Kindersley, Saskatchewan,
            Local Time:
            1:08 PM
            That’s probably too high of a rpm. I dont think the Cheatah will down shift. I could be wrong though. Will it down shift a a lower speed/rpm? With it shifting that hard the line pressure may be too high for it to shift down. Kim
             
          • FlDart360

            FlDart360 Well-Known Member

            Messages:
            199
            Likes Received:
            101
            Joined:
            May 30, 2016
            Location:
            FL ,Zero Elevation
            Local Time:
            2:08 PM

            You know Kim now that you brought it up I'm not 100% sure if it has down shifted before? This weekend i will road test and see what happens at a much lower speed and RPM. I am also going to hunt down the serial numbers on or near the pan rail.
             
          • FlDart360

            FlDart360 Well-Known Member

            Messages:
            199
            Likes Received:
            101
            Joined:
            May 30, 2016
            Location:
            FL ,Zero Elevation
            Local Time:
            2:08 PM
            Ok I was able to get something done today. I took the car out and punched it from 45MPH and yes it did downshift at that speed. Second I retrieved the serial number off the pan rail. PK432 9438 8666 6243.

            Last weekend when I punched it from 60MPH and it stayed in 3rd maybe that might be normal??? I would still be curious what the serial number says about this transmission just so I might know a little more about what I have. Thanks.
             
          • Mopar69gts

            Mopar69gts Well-Known Member

            Messages:
            153
            Likes Received:
            138
            Joined:
            Mar 7, 2018
            Location:
            Mesa az
            Local Time:
            12:08 PM
            Your transmission - 4329438
            Is from a 1985 dodge truck
            318 , 727 , non - lockup , HD , long Ext...

            At least that's what my chart says.
             
            • Thanks! Thanks! x 1
            • 66fyssh

              66fyssh Don't Stop Believin' FABO Gold Member

              Messages:
              5,984
              Likes Received:
              5354
              Joined:
              Jun 22, 2013
              Location:
              Northwest GA
              Local Time:
              2:08 PM
              • Thanks! Thanks! x 1
              • oldkimmer

                oldkimmer FABO Gold Member FABO Gold Member

                Messages:
                18,181
                Likes Received:
                5801
                Joined:
                Nov 11, 2006
                Location:
                Kindersley, Saskatchewan,
                Local Time:
                1:08 PM
                Ok, so now we know the truck had way taller tires. So now the governor needs to be changed to a higher rpm so that the tranny will kick down. Ur little tires have the rpm’s too high for the kd to work at a decent speed. Check ur rpm at speed then call A&A and they will set up. Kim
                 
                Last edited: Aug 23, 2020
                • Thanks! Thanks! 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.