Auto Trans tuning with HPT
09-25-2007, 09:47 AM
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Staging Lane
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Auto Trans tuning with HPT I have a 2004 GTO thats seems really lazy between shifts. I would like to firm it up quite a bit. Any body got a file or any good info of what to change to increase the shift firmness in my 4l60e through HP Tuners. Any help will be greatly apreicated. Thanks
