A comment on aftermarket fan clutches... I tried them once on a Durango. The orignal was wobbly and I wanted to fix it on a weekend so I went to the parts store and bought one from stock. That truck sounded like an air boat... the clutch wouldn't let go below 3000 RPM even when it was -10 degrees out. Literally. A week or two later I returned it and tried another. Same problem. Then I went to the dealer and paid up for a factory clutch. Fixed. If anybody wants a slightly used "Torqflow" brand fan clutch, send a PM.

The '70's style MP clutch on my hot rod has worked perfectly.

Bottom line I'll stick with OE - new or used - for fan clutches.