By overfilling you are basically testing...
Once you KNOW this is a problem and the ONLY way to KNOW is to run with a pressure gauge and SEE if that is what is going on. After that, the 700 filter in a stock pan is NOT the cure.
Diagnois your problem then FIX it , do not band aid it.
One bad flair can kill any 2004r. Band or direct clutch.
The reason you don't want it overfilled all the time is eventually it will heat up and expand and it is usually after a hard run or street abuse. They will vent and get all over your car and at worst get under the tires and then you have a handfull. Overfilling is a test. Period. To run this way for an extended period of time and risking serious injury to your car and to you is silly. Then all sorts of blame will come out. Suppose you do this with a trans from vendor X and it vents due to overfilling and you wreck your car. You will be on the doorstep of the builder the next day and he did nothing wrong.
This "band aid" has contributed to many a wrecked cars, in turn blaming the trans when it in fact was the fact that it was overfilled. We spent many hours thinking and devoloping our sumps and pans to CURE this. Ask around. I have to admit, We have recieved more calls on this product than any other we produce. "Hey, my flar went away" and "Now, my pressures at wot are stable." These are true testimonials and a product that does exactly what it was intended to do. Even the Wheelstanders have noticed it. Like I say, ask around.
Also they are very light and dissapate heat genuinly faster. That is what t-6061 aluminum will do. Drain plug and all one of the best investments you can make to help or assist the 2004r to live.
Bruce
WE4
PTS XTREME