Hi,tried running my tgx with a 2 speed trans today for the first time.I'm wondering if it was adjusted right because i couldnt hear the gears changing when the car was in motion(but it was really promenant when the car was revved whilst held off the floor)Is this normal? The prop shaft kept popping off too,has anyone else had this problem? and could anyone tell me the right way to adjust the transmission? many thanks.[]