After looking at many different posts I am yet to find my problem mentioned. My 2002 XG350L 5sp automatic speedo jumps around. Seems to stay steady at slower speeds but stops working all together past about 25MPH. Any thoughts? I am wondering if it is run by a cable and tranny gear (mechanical) or if it it run by electronic sensors off tranny or at the wheels? Where would I find the sensors and any help on best way to check and replace? Thanx for any help as I am new to this car.