I have a 96 toyota tacoma 3.4L 4WD.. during normal highway driving my crankshaft pulley started to come loose, lots of lights and a crankshaft position sensor code and i pulled over immediately pulled over and shut down the vehicle, after a tow home i discovered my crankshaft pulley loose. I have it ready to go back together...timing was unaffected, and my crank suffered no damage. My question is on the inner collar of the pulley that actually is in contact with the shaft has a rectangular groove in it which appears to have a set key that fits into it and the FSM calls it "pulley set key". I have called three dealerships and all they can give me is the woodruff key for the crankshaft timing gear. They say there is nothing else that goes on the shaft. So if there is no set key for it why is there a groove on the pulley..please help..i love my tacoma and take good care of it(i had not checked the torque as a maintaince procedure oops) I want to put it back right Please Help TY Justin