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Transmission fluid drain, and Mercon flavors
I am about to drain my transmission ('05 F-350 KR Torqshift) by dropping the pan and changing the inline filter. I've done some reading on this (PowerStroke.org is an awesome resource) but am still confused about something.
The owner's manual is very explicit about not combining Mercon, Mercon V or Mercon SP as they are "not compatible". Granted, my Torqshift is supposed to have SP in it, but is there a way for me to be certain? I bought the truck used with 70K on the clock and it has 88K now. I don't have any records of what was done.
Will I frag the transmission by using SP if it did not have SP in it before? After all, I'm only trading out about half the fluid with this technique. And is there a way to tell what's in it now?
'11 F-150 Coyote
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