It happens when I first start it up and it sounds like you're putting a piece of paper into a fan blade. It's most notable when the clutch is depressed, but also does it as I drive. It lasts about 10-15 minutes until the engine warms up.
Sounds like my old '68 Cougar (when I was much younger)... Had to adjust the clutch rod so that it pushed the bearing further.

Is there a clutch adjuster in there somewhere?
Anybody else having a similiar problem?

Let me know....

http://members.home.net/kaywt/97_F150.htm

[This message has been edited by kaywt (edited 06-30-2001).]