There is a Dexron synthetic blend as well as the full synthetic. http://www.mobiloil.com/USA-English/MotorOil/Other_Products/Mobil_1_Synthetic_ATF.aspx http://www.mobiloil.com/USA-English/MotorOil/Other_Products/Mobil_Dexron_VI_ATF.aspx With a fresh rebuild I'd go with synthetic. One test showed synthetic outperformed Chrysler ATF+4 http://www.amsoil.com/shop/by-product/transmission-fluid/automatic/signature-series-multi-vehicle-synthetic-automatic-transmission-fluid/?zo=1606470&page=%2fstorefront%2fatf.aspx The zinc additive / start-up and break in is a good recommendation. Thanks, Gary H. > -------Original Message------- > Rich: > There are many opinions about this issue. The norm appears to be the > Dexron for the 727 but I use the Mobil One Syn ATF in mine. My trans guy > was fine with that. It was recommended by a previous member on our board > , Don Dulmage,so I took his advice. I also use the Mobil One 10w30 with a > zinc additive. But only after running the break-in oil for the initial > start-up and break in. -- -- -- Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email 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. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en. --- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to 1962to1965mopars+unsubscribe@xxxxxxxxxxxxxxxxx For more options, visit https://groups.google.com/groups/opt_out.