No tune needed, but you need to have the ECU recalibrated for the new ratio.
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Sometimes I think that government fits that old-fashioned definition of a baby: An alimentary canal with an appetite at one end and no sense of responsibility at the other.
- Ronald Reagan
Saleen S/C 3.2 pulley tuned by JDM Engineering, GT500 pumps, CHE goodies on the rear, 4.10's, KOOKS/ high flow catted X pipe with PYPES Violators, Spydershaft, TCI 3500 stall, PA deep tranny pan. Meziere w/p,M&H 325/45/17 DRs.
future mods.... a 3.0 pulley
May I suggest you give Doug at Bamachips a call on this question (205/302-0231). I'm no expert on these new car computers, but I would be willing to bet that there is some black magic in there that considers the car's speed in calculations. And from looking at the duplications in logging parameters, I would be concerned that a change in one place for the gears might not be enough to handle all the internal black-box calculations.
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2006 GT Coupe Premium
Automatic, ICAP, IUP, Active Alarm, 17" Bright Cast Alum.
Graphic-Express hood & side stripes
Having the change down right now. I have a 5 speed, dealer told me the pcm is going back to Saleen to be recalibrated if not the speedo will be off. I have 07 Gt with the optional 355 posi. I did not think such a small gear change would require a recalibration I guess I was wrong again.
Having the change down right now. I have a 5 speed, dealer told me the pcm is going back to Saleen to be recalibrated if not the speedo will be off. I have 07 Gt with the optional 355 posi. I did not think such a small gear change would require a recalibration I guess I was wrong again.
Why would the PCM have to go back when the adjustment can be made in about 30 seconds with the SCT tuner? All you need to change is the gear ratio. There are no other adjustments.
Do you need a tune if changing gears in an auto? 
