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Hi;
I've just learned that trans fluid for C-6 has changed sometime in the past and that it's suppose to be Dex II. Well I did a partial change of fluid about 700 miles ago and (yep) I put type "F" in it. I went to an auto parts store at that time, that I don't normally go to and got the wrong info.
I went camping and noticed the engine working hard (had 10ft camper on it) so I stopped a familar auto store and check fluids decided to top off the trans. That's when I learned about the difference.
So, have I just ruin the trans? :oops:
 

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I'd pull the pan and drain the converter ,there's a converter drain plug beside one of the converter bolts and refill with either Type F or Dextron 3 not a mix , and you shouldn't have hurt the trans but it isn't a good idea mixing the two
Frank
 
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