Fair warning, you may cause transmission damage! That being said... try holding the throttle wide open with it in park. See how it bounces around 4K RPM? Might be that safety feature, where if throttle is at WOT but the computer sees no load, she limits RPM. I don't know exactly how that works. But generally speaking, you have to ease into the gas for a long smoky with a stock GTP. Mine anyway. It usually yeah smokes em good but when it grabs it hooks and whoa man is it tough on the differential.
