2011 Avalanche 5.3l/6l80. Trans has Sonnax zip kit and fresh rebuild but did the same thing on stock trans. I have modified TCC slip tables. When crusing along at any speed in 5th or 6th gear, ill floor it so it downshifts, then when I let off the gas it shifts very hard back into 5th and or 6th gear. Only shift hard when doing this. What table should I adjust to stop it from doing that? Torque adder?
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