Thats probably nowhere near long enough to cool down the motor, I'd say half hour to forty five minutes minimum! I was told to put the shifter into manual mode gear#1, hold brake and rev to1200-1500rpm, let off the brake.... at the same time push gas down! Let tranny shift itself in manual mode(trust me it will shift itself at redline, try it out sometime), should cross the line in 4th gear!