OMG!!! I took out my fan clutch and took it back to the parts dealer that I bought it from to exchange out under warranty. When the newer clutch was a different model number, I questioned why. The counter person checked the book and told me I was sold a "diesel" fan clutch and the gas fan clutch was $60.00 more!!! When I compared them, they physically looked the same but the associate told me that a diesel fan clutch will not engage at the same temps and it is designed to turn and function in a counter-clockwise direction. I put the new one in and as soon as the temp started to rise, I could hear it kick in and the gauge immediately started to drop. I am furious!!! What recourse do I have because I smoked an engine because of this and went through 3 fan blades.