1-2 in 20kmph and 2-3 i havent notice exactly. should be somewhere around 40 - 50. 80kmph is the peak speed of 3rd gear. there is no any incident such as that it revs but not moving. it moves fine through out the transmission period and i haven't notice any OD switch. Also i still don't know exactly what type of a transmission this car has, some say its CVT and some say its 4 speed automatic or something.