why is 03-04 viscous fan different?

mark.kellgren

Member
Aug 23, 2005
17
3
Charlotte
I have an 04 and realized today my viscous is shot. Went to order another and to my surprise, found out the regular removable viscous clutch ends at 02, and for last 2 years, the entire fan assembly must be replaced. My question is why the F they did that, and is the superseded fan-clutch compatible with the last 2 years? Just ordered a replacement assembly so now I'm just curious, given the engine is the same.