I have about 90K kms on my car...should I change the transmission fluid? I don't know if it has ever been changed, and the maintenance schedule just says "inspect fluid level"...it never says "replace transmission fluid". The shifter's starting to get that peanut buttery feeling these past few cold days...maybe I'll do the "tranny cocktail". But what's the difference between ATX and MTX fluid? Could using ATX fluid in an MTX have undesireable consequences (i.e. excessive wear, etc.)?