new to the whole 6l80 tuning. but also having this issue in a 4l80. both have a fti 3600. both will not break tires lose to do burn out. you can bring them on the break then let off to get vehicle to move. as soon as it does it will flash cpnverter and break tires lose. but not without rolling. doesnt matter how hard you try to hit the converter and how lose you hold breaks without letting car move

