The difference is in the chemistry of the fluids,additives etc.Use whatever the dipstick says. If it says ATF+3 then use ATF+4 as Chrysler sent out a TSB to use it in place of the +3 last year. Besides if you have warranty and you use the wrong fluid, the dealership will not warranty it if they find out. Believe me I work in the service dept at a Dodge dealer.$2500++ to rebuild is a lot more than the correct fluid now.
An association of men who will not quarrel with one another is a thing which has never yet existed, from the greatest confederacy of nations down to a town meeting or a vestry.
Thomas Jefferson
