George,
As I understand it, the Tremec will always feel a little notchy due to it shift rail design - I recall seeing an article on it - here:
http://www.moderndriveline.com/Techn...its/tremec.htm
"Borg Warner transmissions are now owned by Tremec Corp, however, the design remains the same between the two transmission lines. Borg Warner transmissions, for the most part, use a single rail gear selector and carbon fiber lined steel synchro rings where the Tremec transmissions have a single rail moving three shift rods internally. This three rods have spring loaded detents that make the transmission feel notchy during shifting. Instead of carbon lined steel synchro rings, the Tremec is built with solid bronze synchros with no linings. It is for these reasons that the Tremec does not like to shift well above ~6,500rpms."
Hope this helps,
Jim