Don't know if the actual programming is different but as you said the additional torque of the turbo or turbo lite over the NA model would make the transmission less likely to downshift so often. I haven't had a NA model PT to compare it to but my GT takes quite a bit of throttle going up a hill to get it to downshift on its own.
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2003 Almond GT AutoStick, body colored rear splash guards and hood struts, chrome gear shift, AC & vent knobs, billet steering wheel spokes and pedals, AMX1397 Turbo-Intake Pipe.
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