So, last weekend I had finally gotten all the parts and supplies together to do the "JMod" to the transmission. So called the JMod for Jerry Mod as the instructions and specs were posted by Jerry Wroblewski, a retired Ford Transmission engineer.
I was supposed to have all the stuff a long time ago, but I had thrown in the gaskets I needed from Ford in a internet order along with parts for another project. Well, one of the parts I ordered came up Obsolete/Not available so the dealer cancelled my whole order instead of sending what they could get. Then to top it off, didnt bother to contact me. Here I am a month later, "Where are my parts?"
Anyway, I re-ordered all my stuff from a different dealer and they just canceled the one piece they couldnt get.
Last weekend I had 3 days off, so I put her up on ramps, did the cooler line trick to drain the fluid out of the pan and then dropped the pan.
Then I dropped the valve body.
(I had gotten ATF on my phone's lens so it made this pic soft/not sharp)
I took the separator plate off and drilled the specified holes to the specified size, then I used a razor blade to trim the shavings off the plate.
Got it back together, and added a magnefine to trans cooler return line.
Refilled with 9.5qts of Kendall Mercon V.
Excitedly took it out and it was....
Not great.
What happened was the 1-2 was nice and firm, but the 2-3 was doing a weird bump-slide-bump. All other shifts were unaffected. 4-3 was even fine. 3rd held fine once engaged, even at WOT.
Confused, I put her to the side and did some asking around.
Someone suggested putting the accumulator springs back in, drilling some of the holes out larger and changing the main pressure regulator out with a Sonnax w/Increased pressure spring.
I ordered the needed parts and went back into it today.
I recovered 3.5qts out of the cooler line which I did put back in.
Once I got it back apart I studied it pretty good to try to find why the 2-3 was acting up.
Bingo:
Put that ball back where it belongs and installed the Sonnax parts. Put the accumulator springs back in and bolted it all back together.
Like I noted above it got 3.5qts I recovered out of it, then 2.5qts of Kendall Mercon V, and then 3.5qts of Castrol Transmax Mercon V.
Its perfect. I love the way it shifts. Since the accumulator springs are still present it softens it. At part throttle the shifts can be felt due to the larger feed holes and boosted regulator, but are not overly harsh. It kicks nice at WOT though.