Thought I'd follow up:
I held off on installing the trans. speed sensor. The differential speed sensor seems to be hard to come by. None of my local parts stores had it.
I did find it online however at
www.rockauto.com.
I hate paying dealer prices.
The differential speed sensor was the problem. My cousin took the trans speed sensor back to the store, and coincedentally ran across a guy with the same problem. They were trying to sell him the wrong sensor. She set 'em straight.
You guys Rock! thanks for the help.