That trans tune is scary. Not sure why everyone puts so much faith in shitty hand held tuners. For those wondering what I'm taking about. The 6l80 is a clutch on clutch transmission and needs some torque management to shift. Shifts should be quicker, crisper, and firmer than that. Those hand held tuners usually remove most torque management, creating a lot of slip and making it shift like a slush box. If you want a tune find someone reputable with hptuners
