I need to know what kind of transmission fluid to use in my tranny. I have a 2001 4.2L with the 5 speed manual. I've got 30k miles on it, and it's due for a change. Thanks for any help.

 

M5OD still takes Mercon ATF. Mobile 1 meets Mercon specs, if you'd prefer synthetic.

 

That's funny. Two people have told me that standard shift trannies use 90 Weight gear oil. Not Mercon ATF. Why would a manual standard transmission use ATF???

 

Boy I'm glad I didn't listen to the goons at WAL-MART. They tried to tell me it used 90W gear oil. I looked in my manual, and it states that I should use Mercon ATF. Sorry for the trouble, I just wanted to make sure before I screwed my tranny up. Thanks AjRagno for the info. I appreciate it.

 

OLDER MANUAL TRANSMISSIONS LIKE THE AWSOME FORD TOPLOADERS USE STANDARD GEAR OIL. I HAVE REBUILT MANY OF THEM. I ALSO HAVE REBUILT SEVERAL MUSTANG T5 TRANS. THEY USE ATF.I BELIVE ONE REASON IS BECAUSE OF DIFFERENT METERAL IN THE CONES OF THE BLOCKING RINGS,AND THEY ALSO HAVE NEEDLE BEARINGS BETWEEN THE INPUT AND OUTPUT SHAFTS..AND THE ATF IS MUCH THINNER VISCOSITY. WELL ANYWAY USE A SYNTHETIC ATF LIKE MOBIL 1 OR AMSOIL..