Originally Posted by
Chombi1
Hydrogen embrittlement maybe? Did you by chance soak the FW in a solvent for cleaning? I know it is newish, but a lot of us clean NOS components to get rid of the old grease in them and replace with new.....
All the sprockets were cleaned the same, IIRC, in a water-based-ultrasonic metal approved cleaning solution. Because they were NOS, I might have just cleaned them with hot soapy Dawn dish detergent. My guess is there was a weak spot between the splines. Only a metallurgist with a microscope would be able to tell us for certain.