TransGo Kit in a th400. Which options to choose

Discussion in 'The "Juice Box"' started by Sebambam, Jan 8, 2021.

  1. Sebambam

    Sebambam Well-Known Member

    hey guys i am ready to install the transgo kit in my th400

    the kit offers different options from driver to competition, and i would like to see what experience do you have with it.
    i heard the options are conservative.

    So the car is not a daily lol a 68 A-body Twin turbo small block Street car /hotrod.

    3;73 gears on a 28" tire...
    I like it firm but it shouldnt be RACE ONLY

    what transgo setups have proven to you
     
  2. johnriv67

    johnriv67 Well-Known Member

    This is not exactly the best advice, but on my 67 Riviera I used the TH400 1-2 and drilled both holes to .110/.125 and it broke the tires loose on the 1-2 shift at 50 mph when the air temp was ice cold and the tires were inflated to 40 psi.
     
  3. Sebambam

    Sebambam Well-Known Member

    lol that exactly the type of advise that I'm looking for lol..

    So where you happy?
     
    johnriv67 likes this.
  4. Sebambam

    Sebambam Well-Known Member

    working on it now.. good news is it was rebuild before :) bad news it was obviously set up for towing with only 1 check ball... lol
    At least i have summit racing 15 mins from the house , so off to get check balls
     
  5. telriv

    telriv Founders Club Member

    In all reality you ONLY NEED one ball.
     
  6. Sebambam

    Sebambam Well-Known Member

    So tempting... I have to say it.. " that's what she said"
    The transgo kit asks for 3 I think
     
    GS464 likes this.
  7. Dwayne B

    Dwayne B Well-Known Member

    I installed A trans go kit in A TH350 in my 72 Skylark when I had the automatic in it.
    I really like the kit,the first one I had installed. The best I remember I had A option on two different springs, one was street and strip the other was race. I chose the street and strip ,it made it shift very firm.
     
    Sebambam likes this.
  8. Sebambam

    Sebambam Well-Known Member

    Install went smooth , i want to also cruise the car so i didnt install the " Competition only" parts , lets see how she will do.
     
    Dwayne B likes this.
  9. Matt Knutson

    Matt Knutson Well-Known Member

    The instructions advise to be conservative, as, line pressure will already be greater. They supply 2 valve body gaskets in case you want to go back and adjust later.
     
  10. Matt69olds

    Matt69olds Well-Known Member

    If this is a turbo application, your going to need to do something with the vacuum modulator. The transmission is not going to be happy when the vacuum modulator sees boost instead of vacuum!!

    There are mechanical modulator kits, or you can go with a manual valve body. You can use the TransGo kit, set it use using the manual shift option just don’t connect the vacuum line to the modulator.
     
  11. Sebambam

    Sebambam Well-Known Member

Share This Page