As there has been much talk about what type fluid our trans have in them , I guess it depends on when they came down the assembly line . I changed the fluid in mine a few weeks ago,to Amsoil 75w-90 in it now and can report that the trans shifts better, and a lot less noisy ! Is it perfect , no, but then I have found few trans that are perfect all the time. Can I live with it and enjoy the car , yes.But when I changed it out , the first thing I noticed was the smell , and it took me a few days to figure out what it was that it reminded me of,the yellow 3 M adhesive ! Now what is in both the oil and the adhesive ??? Not sure , it will take someone smarter than me to figure that out lol. But I also sent a sample off to have it checked to see what it looked like and I am glad I did ! I know that some of you think that the best thing to do is just run the oil that Ford shipped it with and it will all be good , but if you look close at the results of this and some other samples you may want that [censored] out of the trans .