shift firmness & hypertech
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That "JUNK" got me my first 12" run with the stock converter, by adjusting the shift points. I have used 100% firmness from day one and I think it's fine. Broke trans a couple years back but that was do to a bad sprag that broke my rear planetary, not caused by shift firmness.
). My friend left his at 100% for about 25000 miles, and It messed up the transmission in his SS. 

thanks to my good friend Manny
