Have a 95 Mighty Max. 2wd. Automatic, Overdrive not kicking in, goes 1,2,3 and stays in 3rd. I push the OD button on and off and nothing happens. I was told it's a temperature sensor that will not allow transmission to go into OD. Problem is, I don't know which one it is, I see 4 sensors around the thermostat housing but don't know which one it is. Can anyone take a pic of which and where I should be looking at? maybe the proper name so I can buy it at the autoparts? pushing my luck a little, anyone has a Transmission wiring diagram?