Ford will tell you never (as most companies say, most manual transmission are not needed to be changed.)
But me personaly, i change mine about every 7,000 to 10,000. I us ReD Line MTL transmission fluid for my car in stead of the ATF cocktail that ford and orthers reconmend...Don;t get me wron the CockTail is great, but i find that Red Line Works better for me car.
roz
