working on my 1991 1/2 ton 4x4 , 318 with 4 speed auto ....
anyway , it shifts in and out of ovderive by it's self fine , but when i use the button on the dash to take it out of overdrive manually , nothing happens .
i'm about to tear into it this weekend , but thought i'd ask for some input as to where to start to look , hopefully to save myself a bit of time .
the computer was replaced with a factory rebuilt one last nov .
i'm thinking maybe the switch on the dash might be faulty .
it stopped working when it hit -40 for 2 weeks here , so who knows what may have stopped working .