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Thread: 8 speed Automatic 8L90/MQE and Jasper tune

  1. 10-27-2023 #1
    cfar
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    8 speed Automatic 8L90/MQE and Jasper tune

    I have found out from a reliable source that Jasper engine has worked with HP tuners and GM on a transmission software update for the TCC lock-up delay that is correcting a lot of the trans-shifting issues and failures. If you buy a Jasper unit you get a handheld flasher to load it after replacement. Does anyone have a copy of the tune?
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  2. 11-02-2023 #2
    1badc10
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    Hmm... would be interesting to see.
    **Capt. Ron - 7th Dist. Fire**
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