Quote Originally Posted by abeemanator View Post
He is talking about the km148 with the 3 speed overdrive tranny Miked50, I had the same problem after I replaced the head on my truck, one way to test your o/d is to jack the rear tires off of the ground and let it idle, and listen to see how many gears it shifts through, if it only goes to 3rd, give it a little gas and see if it goes into O/D, click the O/D off and on and see if you can hear it shift back and fourth, if not there is a temperature sensor near the thermostat housing, check to see if all the wires are plugged in, if so then check the O/D relay behind the drivers side kick panel, and test to see if it works, when the truck it warm enough you should be able to shut the truck off, turn it back to on, but dont start it, and click the O/D button and listen to see if the relay clicks, if that all works then it is more than likely somewhere between the relay and the tranny. I can take a picture of where the wires go if you want me to
yes please. done some tests already. no luck engaging the OD. tried it first at 60kmh, nothing. pushed it a little shy of 80 kmh, still nothing...OD relay already checked and it is still good. btw, as stated it has been converted to a diesel 4d56 turbo a decade ago by the previous owner. the trany wirings are located at the left (driver's) side). kindly show me a picture of the spaghetti mess.