Well, being a big fan of our absent Don D his strong advice was to go with Mobil One syn ATF. As I recall, he said this change for him resulted in much better trans life. They seem to run cooler for one thing. My trans builder didn't recommend it either but since Don D said so I had to give it a try. It's working for me. Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.