ok so here's what happened.my friend has changed my timing chain and gears on my 1990 dodge dakota 2wd with the 3.9 liter v6.this model has 4 separate belts not a Serpentine.so when he is re assembling it he fails to put back on the tube thing that acts like a timing mark.so now we are having problems figuring out exactly where it mounted. if anyone can explain this it would be great or even better yet if you have the same motor please oh please take a picture of your "timing tube" im not sure of the exact name of that part and send it to me. [email protected]