I just got my 00-5600 trany back together last sunday put about 150 miles on it so far I changed the input shaft and put in new fifth ahd 6th gear syncro rings when I tore the transmission down these where the really bad ones and sence they are dicont now these were the only two I could get my Question is it shifts great in all gears but third and fourth and these rings looked as good as the new ones when I had them out. I added a another fill plug when I had it out to get more oil in it I used the factory mopar lube Thinking of adding Lucus aditive but dont know which one to try they make stuff for auto trannys that says it will smothe shifting in manual trans but their oil stabilizer aditive says it will work in the manual gear box as well has any one tried either of these ? what should I try leaning tord the oil stabilizer Thanks