Yikes!!! If I've been reading your posts correctly, didn't you say that shifting issues began AFTER you added Mercon V?
My advice, for what it's worth, would be to "cleanse" the tranny first of all old fluid with regular DexIII/m. You can do this via filler tube and hand pump. After that, THEN add the Seafoam trans tune.
That's the way I did it on my 1993 Ford Taurus GL 3.0 V6, axod metric tranny with @155,000. That was back in March of this year and tranny is still running strong and shifting well.
My advice, for what it's worth, would be to "cleanse" the tranny first of all old fluid with regular DexIII/m. You can do this via filler tube and hand pump. After that, THEN add the Seafoam trans tune.
That's the way I did it on my 1993 Ford Taurus GL 3.0 V6, axod metric tranny with @155,000. That was back in March of this year and tranny is still running strong and shifting well.