This is actually what you want:
TCCoA Transmission Article - Index
Have a look at page 12:
TCCoA Transmission Article - Page 12
Have a look here for common symptoms everyone:
TCCoA Transmission Article - Page 4
And yes you want to replace it, i think even the 4R75W of 2004 should have it replaced.
And these are the two parts you'll want to add steve:
1-2 accum pistonF7AZ-7F251-AA - $9.17
2-3 accum piston F7AZ-7H292-AB - $5.88
Thanks CobraRed!!
I dropped the valve body today and took a look and it appears that the factory already drilled the Jmod holes in the plate !
I matched it up with the plate I got from VAP and every hole was drilled and in fact some on the factory plate were even larger than the VAP modified plate so I put back the original plate with new gaskets.
I know the tranny was not played with because I am the second owner and the first owner never did anything to the car.
The yellow plug was in the pan as well and you could tell that the factory plate had been done at manufacture time because the Jmod holes looked identical to the other holes. IOW no scrapes or marks or anything.
Evidently, mine got the full treatment right from Ford.
I didn't want to play with the accumulators because that would probably be overkill for what I want.
It was interesting and the instructions were pretty good.
Several items that were a PITA:
1. The little screen thing is a royal PITA to get back and stick up there while you are re-installing the valvebody. A little petroleum jelly helps, but the sucker wants to fall all the time and is very frustrating.
2. Their are 2 oddball bolts which have the threads starting up about 1/4 inch and the ends are kind of pointed. They only go in one place but make sure you mark where they go when you take them out.
3. It's nearly impossible to keep from getting a tranny fluid bath when doing this if you are doing it with jack stands/ramps. How ever many rags you think you need, multiply it by 5!
4. A cordless drill set on the lowest torque setting helps a whole lot because there are a lot of bolts.
Overall, I would give this an 8 out of 10 for the average mechanic doing it on ramps in the driveway.
Drop it to a 4 out of 10 if you have a lift.
Overall lot's of fun!