by geeves » Sun Mar 19, 2017 5:38 am
most likely the speedo sensor on the gearbox. This is electronic and sends a pulse to the speedo which sends a signal to the ecu for the auto. If its not going over 70 it may not be getting into overdrive. My wizard did this but slightly different. When cold it worked fine but then started pulsing and eventually just went to 0 While pulsing the gearbox was changing gear in sympathy making it effectivly undrivable.
Auto sparky can test the sensor etc quite quickly and cheaply.
Sanding your knuckles before starting work can help. That way you cant skin them