Our kitchenaid blender was non-funcitioning for about 6 months. The closest to finding a wrench that fit were golf divot tools. Some were a little too large, others a little too small. There's probably one out there that would fit, but we didn't find it. People at the 800 number told us to call repairmen, none of them returned our calls. A local handyman had it for about a month. He was unable to do anything with it. After reading the sugestions in this thread we pried it off with two large screwdrivers, opposite each other. We had one person on each screwdriver. One screwdriver was about 14" and the other about 10" from tip to end of handle. It popped off after about 30 seconds of fooling with it. It must have shot high up into the air, because I think that it took about 3-4 seconds to hit the floor again. (We have a high ceiling). Anyway, the threads on the clutch stripped, leaving little silver fractions of circles (make sure all of these are out of the shaft threads to get the new clutch to screw down securely). The threads on the shaft for us seemed to be fine, and our kitchenaid blender is working great again. Good luck.
pedro8756, June 2007