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Thread: GM A8 - do these TC locking speeds look weird?

  1. #1
    Tuner in Training
    Join Date
    May 2023
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    Kyiv, Ukraine
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    GM A8 - do these TC locking speeds look weird?

    I've recently got to look at my TC locking speeds for A8 and I can't understand what will be the best strategy for them and now I'm not quite sure I got them right at all. For example at 50% TPS 3->4 shift is happening at 106 km/h, release speed at 50% for 3rd is 21 km/h and lock speed for 4th is 30 km/h. Does this mean that TC will unlock and immediately lock after the 3->4 shift?

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    Please weigh in on the subject if you have tuned 8L45/90

  2. #2
    Potential Tuner
    Join Date
    Jan 2021
    Posts
    3
    Is this the original factory procedure? Please send your program and log. So you can analyze.

  3. #3
    Senior Tuner TheMechanic's Avatar
    Join Date
    Jan 2014
    Location
    SoCal
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    1,604
    I disable TCC in lower gears. Example is 6LX0e. I only have lockup in 5th and 6th gear. No lockup in any gear with WOT