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Thread: 6L90 tune 2009 2500 HD

  1. #1

    6L90 tune 2009 2500 HD

    wondering what the best way to frim shifts and add durability to trans. dont have any exp tuning 6l's thanks
    99 Regal- CT PT 61 turbo, IC, 65# injectors, 1.9s, LT1 MAF, Custom built Trans, 3000 stall converter, 11.84 @ 117 1.81 60'

  2. #2
    here is the file i pulled compared to others seems way different is this because its a 2500?
    Attached Files Attached Files
    99 Regal- CT PT 61 turbo, IC, 65# injectors, 1.9s, LT1 MAF, Custom built Trans, 3000 stall converter, 11.84 @ 117 1.81 60'

  3. #3
    Potential Tuner
    Join Date
    Jun 2017
    Posts
    8
    Im having trouble with my 6l90 any ideas on tuning

  4. #4
    Best way to firm up shifts is decrease shift times. Much more positive feel without the harshness you get when altering inertia profiles (my experience). Increase line pressures as well a bit at a time though. Also under tcc slip ac with off drop those to 0. Go to transmission torque management tab and alter shift torque factor by 20%, shift torque factor will pull timing during shifts and dropping it x% will limit how much timing is being pulled. Under torque management-> torque reduction -> downshift -> set to disable, speed control terminate -> change to immediate. try those and see if its what ya like.
    Last edited by RySmDPT14; 07-05-2017 at 05:01 PM.