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Overfilling wacker


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Overfilling wacker

So just a quick question wacker.  but first some background  I worked for GM for over 11 years been a technician for over 17 years. . Have built more transmissions than I can remember.  Before I left gm to open my own shop I was on my last class of the 10r90.    Anyway.   I have had so many problems with over filled transmission causing airation  And over temp problems.  Mainly fwd like the 6t75 .. never tired to over fill the 6l80/6l90  But I see you recomend a quart to 2 quarts over    why?  And have there been any problems. 

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