djradz,
It works just great, but the recommendation from Tazz and adding the nut to the shaft prior to installation is what makes me feel that the "Thud" shouldn't happen again. Thanks all for the advice & comments.
I'm not in the business of selling fabrication, so the description of the process is as good as I can offer. A visit to your local weld shop with the above description & a $10 bill should do the trick. Grind it yourself and add a little paint and your business!