TransGo TF3- tie back or run cable

Discussion in 'Transmission and Drivetrain Tech' started by 340Duster247, Apr 15, 2018.

  1. 340Duster247

    340Duster247 Well-Known Member

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    hey guys just finished up rebuilding my 727, with an all new Frank Lupo 4200 stall convertor and installed a tf3 full manual from transgo. Now I know you can either run a kickdown cable and adjust for the pressure or just tie the lever back. What would you do?
    This is a street/strip car Just driven on cruises or a local meetup.
     
  2. TrailBeast

    TrailBeast Slightly Twisted Member

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    Not absolutely positive here, but I believe the TF3 kit makes the throttle pressure useless so it doesn't matter what you do with it.
    A cable would be completely pointless, but tying it back won't hurt anything and still be able to go back to automatic if ever needed or wanted.
    I would just tie it back all the way and let it go at that.
     
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    • MrJLR

      MrJLR Built, not bought FABO Gold Member

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      I'd tie it back.....

      Jeff
       
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      • duster44d

        duster44d Well-Known Member

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        Im a little behind I guess ..So what does the TF 3 do in order not to use the lever for shifting.
         
      • TrailBeast

        TrailBeast Slightly Twisted Member

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        It basically turns an automatic into a fluid drive manual trans, and in doing so locks the fluid pressure to a set maximum.
        It has to be shifted for each gear instead of shifting on it's own.
        When this is done you don't have any use for varying the shift points under different throttle loads because the driver does the shifting.
         
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        • 340Duster247

          340Duster247 Well-Known Member

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          It’s been discussed on here before that with the transgo type full manual a cable or tied back must be used and confirms that it the instructions. It’s not like other types of full manuals.
          Some say only tie back in full race car, but was hoping to hear if others had opinions.
           
        • TrailBeast

          TrailBeast Slightly Twisted Member

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          Sorry, I was under the impression the TF3 kit made the TP inactive all together.
           
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          • j par

            j par Well-hung Member

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            I did this last summer on a 904 that are built and tied it all the way back just like TrailBeast told me to and it worked perfect. You can always give it less pressure but you can't give it more. Not enough will definitely do more damage than too much. I actually hooked a choke cable up to it so I can bury it in the cockpit but ended up just keeping it all the way out in that was perfect and ended up just tie it back and getting rid of that.
             
          • j par

            j par Well-hung Member

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            And a totally unrelated question since I have TrailBeast on the line here? I was over at a customer's house and he has his 2-speed Powerglide from the 68 El Camino and I grab the input shaft to check the play and it pulled out like an inch and a half!? That doesn't sound right at all!? What do you think?
             
          • RustyRatRod

            RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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            ZERO need to do either. The TF3 makes the valve body a full manual valve body that does not require the throttle pressure linkage at ALL. It renders the throttle lever on the outside of the transmission totally useless, so it will not make a hill of beans difference where it is. Tied back or otherwise. I would just leave it alone.
             
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            • RustyRatRod

              RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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              Completely normal. You probably should keep your hands off your friends shaft, though.
               
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              • RustyRatRod

                RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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                Yeah that's correct. I've done several and never once seen in the instructions anything about it. I'd like to see the instructions in question, because the several I've seen had nothing about it in print.
                 
              • j par

                j par Well-hung Member

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                Really there's no end play on a 2-speed Powerglide?
                 
              • RustyRatRod

                RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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              • oldkimmer

                oldkimmer Well-Known Member

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                U absolutely need a cable/ linkage or tie it all the way back. Kim
                 
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                • Michael Harrington

                  Michael Harrington Active Member

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                  Does this mod eliminate the engine braking effect when downshifting into 1st? Years ago My 727 had the Cheeta full manual and from secody to first with foot off gas pedal it was like going into neutral until you gave it gas.
                   
                • TrailBeast

                  TrailBeast Slightly Twisted Member

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                  Sorry, I went and watched TV the rest of the evening.:D
                   
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                  • j par

                    j par Well-hung Member

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                    Got anything better than triple r's no?
                     
                  • TrailBeast

                    TrailBeast Slightly Twisted Member

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                    Nope.:D
                     
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                    • 340Duster247

                      340Duster247 Well-Known Member

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                      45A790F1-D8C7-43CB-BE68-5CEFED642124.jpeg
                       
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                      • j par

                        j par Well-hung Member

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                        Could I trouble you to elaborate? I have a customer with a 68 El Camino and we're about to look at this transmission and I pulled on the shaft and it pulled out about an inch and a half and I was like oh crap I'm not sure if it's supposed to do that?
                         
                      • duster44d

                        duster44d Well-Known Member

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                        Im interested in your question also this would be good info for me.
                         
                      • oldkimmer

                        oldkimmer Well-Known Member

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                        No, u still have engine braking when down shifting 3-2 and 2-1. Kim
                         
                      • TrailBeast

                        TrailBeast Slightly Twisted Member

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                        Powerglides have craploads of endplay normally.
                        .030-.060 normally, and on the tighter side for race. (as tight as .015)
                        The thing about powerglides is that the input shaft endplay isn't real critical unless you are putting craploads of power through them.
                        1.5 inches, something might be damaged, or it may be just the shaft pulling out of the splines inside the trans.

                        I don't know much about glides.
                         
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                        • j par

                          j par Well-hung Member

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                          Taking the original posters pardon here knowing pretty much that he has his answer to his question?
                          Yes I was expecting 30 or 60 thousands or even like the one I put in my truck that felt like a hundred thousand or more! This was definitely a full inch and a half! I know nothing about Glides either. And Rusty Rat Rods answer of no isn't what I want to tell my customer for damn sure LOL I'll research everything as always and get some education. As always I appreciate at the very least your educated guess:thankyou: