All I know is that the 4th gen Auto is electronic controlled and on a dyno they need to keep it in 1 gear. When you manual shift it into 3rd and floor it the Tranny will still downshift to the lower gear.. Everything we tried to do with my car it would still downshift. There is a sensor you need to unplug to prevent this from happening or you can tune it out I believe.. Do a search over on LS1tech.. Lots of info on this..
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Jeff
2002 WS6 T/A.. M6..Built 383 TMR tune..461rwhp,458rwtq
2009 G8 GT. Bone stock 13.6@103.. Vararam Intake, GXP Axlebacks, LS2 FRC's
1998 Corvette Convertible, Vararam Intake+Power Duct, Fast 90/90, Ti Axleback..12.8@110
2003 Cobra Convertible 10th Anniversary
http://www.fquick.com/slow-v6
Local car cruise schedule..
http://www.cliffscalendar.com/
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