Mine was locked more than it should be, so got the new Hayden, which by coincedence had the Ford OEM part number scribed right into it as Hayden supplied the original part to Ford. Well to make a long and rather disgusting story somewhat short, I'll just condense and say I installed 3 Hayden fans and they flat DO NOT work. Might as well just run direct drive fan, because these will never shut off. Don't care if it's 10 below zero, been diving 500 miles on the interstate, it doesn't matter, they flat do NOT work so don't waste your money. I then got a new Ford unit and it did not work either, went and got another Ford, but never installed it because I drained the radiator like 12 times swapping back and forth these, and the originl works 95% ok, so to sum it up, good luck, you are goin to need it to get a fan clutch that works.