From the VFAQ Site.

http://www.vfaq.com/index-main.html

huge resource, you just have to adapt the knowledge to the Truck, because it all about 2.0 cars.

Apparently, the factory had a bad run of CRANKSHAFTS, not bearings. The crankshafts were machined just slightly out of spec, and as a result the main center thrust bearing on the crankshaft wears prematurely. When this happens, the crankshaft will move or "walk" every time the clutch pedal is depressed. Some people have complained of difficulty in getting the car into gear (manual transmissions) and the diagnosis has been the same: a "walking" crankshaft. Well, it seems my crankshaft walked so much that it pushed the crank sprocket and the trigger plate forward and caused the trigger plate to come in contact with the crank sensor.