Welcome back Geopappas
. I've used your threads more than a few times
"It seems that either the tranny is slipping, or it doesn't know what gear to be in."
Maybe MLPS
"1. Would a high tranny fluid level cause problems?"
It could
"2. The "slipping" has happened a few dozen times in the past week, and I have not received a CEL. Would I get a CEL if it were a tranny problem?"
Sometimes tranny codes are "lost" when the engine is turned off.
"3. I have read a few posts that have mentioned a TSS. What problems does a bad TSS create?"
Bang (hard) Shift from 1 to 2.
MLPS
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1040336&page=&view=&sb=5&o=&fpart=1&vc=1
and
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/d3/97/0900823d801bd397.jsp
