I was toying with the idea of replacing the fan on my 2000 cummins, looking for more power (as if it needs it) and better mpg's. Anyone tried this, what about cooling under a load, or good quailty brands? All I could find were flex a lite kits for around 550. Thanks for the help.

 

I don't believe you will find an electric fan that will keep the CTD cool

 

Here's what your lookin for.

http://www.flex-a-lite.com/auto/html/diesel-fans.html

I believe somewhere in the write up on these fans, it says something about not recommended using when pulling GCVWH.