I'm trying to change my transmission fluid and filter in a 2002 F250 automatic tranny (7.3 Diesel). The manual shows MERCON and O'reilly is telling me it is MERCON 5? Also is it okay to add MERCON other than motorcraft to the tranny due to the remaining oil in the torque converter?
Mercon is mercon , "5" is just an updated version of the original and should't matter who makes it, as long as it states it is mercon
Testimonial: "thanks for the quick response, I was told mercon 5 was synthetic and they could not be mixed?"
If the top of the dipstick says mercon v then it use it. It does cost alot more but would eliminate the possibilty of problems from switching fluids. and the torque converter probablly has a drain plug on it. take the little rubber round plug out under the converter and turn the engine by hand until the plug appears through the whole. Not all years have this plug but its worth a look. after the converter drains it take I think 16 qts to refill so buy plenty
I went to ford and got mercon 3 in the bulk when i changed filter n fluid i took big line off radeatior and starter truck till fluid looked cleen then put line back on filled trans thats what ford told me to do
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