Here is the JMod write up for the Aero guys to go along with the already existing articles by HookedonCV
https://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=1152107#Post1152107 as well as the TCCOA
http://www.tccoa.com/articles/tranny/index.htmlImages and mod is done on 96' CV. It should apply to all 92+ AODE/4R70W models. Some of the steps are taken directly from TCCOA.
Tools needed to perform the modifications:- New separator plate gaskets (2 required) - 1L3Z-7C155-AA, 1W7Z-7D100-AB
- new transmission filter
- updated 1-2 shift piston (optional) - F7AZ-7F251-AA
- different springs (check for required part numbers/colors)
- 12 qts of Mercon V - CXT-5-LM12
Materials needed to perform the modifications:- Inch-pound torque wrench
- 8mm, 10mm and 13mm sockets and 1/4 ratchet with extensions
- needle nosed pliers
- bottle jack
- Razor blade
- Brake or carb cleaner
- Drill or drill press
- Safety glasses
- Assorted drill bits (check for sizes required)
- File
- rags or towels
Procedure:Drain the transmission fluid. Refer to this article for info,
https://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=1153783#Post1153783 You can either disconnect the hoses at the cooler and let the engine pump the old fluid out or loosen 14, 10mm transmission pan bolts and let the fluid drain. When it's drained, remove the pan. You will see a transmission filter inserted into the valve body. You can remove it by pulling straight down. Make sure that the orange rubberized ring comes out as well. If it didn't come out you need to pull it out of the valve body. Discard old filter and the ring. The valve body should now be visible.

This step isn't really part of JMod but I will mention it anyway. Aero torque converters come with a drain plug. To drain the converter remove the rubber access plug at the bottom of the tranny. You will see the torque converter. Rotate the engine until the drain plug is visible. Undo the plug and let the fluid drain.

To remove the valve body, first take off all the electrical connectors and set the harness aside. Aeros have a harness with several connectors. Whales just have a single plastic circuit board that's clipped into place.

Undo 25, 8mm bolts. There are 2 different length bolts used. I marked the location of all the longer bolts in the image below.

Note the position of the manual valve solenoid. You will need to reinstall it the same way.

Valve body removed.

Location of the pistons.

Now take the valve body over to your work bench and place it into a pan or something similar because there will be tranny fluid. Unless you want your bench covered in it I suggest using suitable container.

There are 2 separator plate gaskets. Image above shows the top gasket. You should be able to peel it off. If it doesn't come off, use a razor blade to assist in removal. Once removed, discard the old gasket.
Note the orientation of the 3 reinforcing plates. They will need to go back in the same order. Remove 11, 10mm bolts. Note the single bolt in the bottom right corner.

Remove the separator plate. You will see second gasket on the bottom. Peel it off and discard. Scrape the remains with a razor blade.

Careful not to flip the valve body as the check balls will fall out.

Locations of check balls and filter screen are highlighted in green. If you need to clean out your valve body, make sure that all the parts go back to the same locations.

We can now modify the separator plate. You will probably want to clean it first with some brake cleaner. Do not drill the valve body!!! Mark the locations of all the holes to be opened up. Then drill out the holes according to the specs listed below. Some holes may already be opened up to the right spec depending on your model year and setup. Refer to pages 13 and 14 on TCCOA tranny article for more info.
http://www.tccoa.com/articles/tranny/transmission/page13.shtmlhttp://www.tccoa.com/articles/tranny/transmission/page14.shtml
Holes 1, 2 and 3 control 1-2 / 2-1 shift.
Holes 4, 5, 6 control 2-3 / 3-2 shift.
Hole 7 controls manual 2-1 shift.
Holes 8, 9 and 11 control 3-4 / 4-3 shifts.
Hole 10 controls reverse.
Hole 1 (1995 and prior models):Mild <300 hp - 0.160" - #20
Mild <300 hp with gear change - 0.160" - #20
300-450 hp - 0.160" - #20
450-625 hp - 0.160" - #20
Hole 2 (the larger the hole, the firmer your 1-2 shift will be):Mild <300 hp - 0.081" - #46
Mild <300 hp with gear change - 0.0995" - #39
300-450 hp - 0.0995" - #39
450-625 hp - 0.125" - 1/8"
Hole 3 (controls 2-1 downshift):Mild <300 hp - 0.180" - #15
Mild <300 hp with gear change - 0.180" - #15
300-450 hp - 0.180" - #15
450-625 hp - 0.180" - #15
Hole 4:Mild <300 hp - 0.081" - #46
Mild <300 hp with gear change - 0.0995" - #39
300-450 hp - 0.0995" - #39
450-625 hp - 0.125" - 1/8"
Hole 5:Mild <300 hp - 0.081" - #46 (if you have 1997 or older use this size ONLY)
Mild <300 hp with gear change - 0.0995" - #39
300-450 hp - 0.0995" - #39
450-625 hp - 0.125" - 1/8" (You must also open up the gasket)
Hole 6:Mild <300 hp - 0.125" - 1/8" / 0.160" - #20
Mild <300 hp with gear change - 0.125" - 1/8" / slot
300-450 hp - 0.125" - 1/8" / slot
450-625 hp - 0.160" - #20 / slot
Hole 7 (open up this hole to reduce 2-1 manual downshift):Mild <300 hp - 0.125" - 1/8"
Mild <300 hp with gear change - 0.125" - 1/8"
300-450 hp - 0.125" - 1/8"
450-625 hp - 0.125" - 1/8"
Hole 8 (1995 or older only):Mild <300 hp - 0.238" - B
300-450 hp - 0.238" - B
450-625 hp - 0.238" - B
Hole 9 (4-3 downshift firmness. 1996 and newer, open up the hole, 1995 and older will have to create a new hole.):Mild <300 hp - 0.081" - #46
300-450 hp - 0.089" - #43
450-625 hp - 0.0995" - #39
Hole 10 (for faster reverse engagement, open up this hole. The bigger the hole, the faster the engagement):Mild <300 hp - 0.076" - #48
300-450 hp - 0.089" - #43
450-625 hp - 0.0995" - #39
Hole 11:Mild <300 hp - 0.081" - #46
300-450 hp - 0.089" - #43
450-625 hp - 0.0995" - #39
When you opened up all the desired holes, make sure to de-burr them with a file. You are now ready to reassemble the valve body.
Install the new lower separator plate gasket. Place the separator plate on top. Reinstall 3 reinforcement plates (Pac Man). Be sure to align them correctly. Torque the bolts to 90 in-lb (7.5 ft-lb). Don't forget the loaner bolt in the corner.

Place the second separator plate gasket on top. The valve body is finished, you can set it aside.

Most people do the shift spring mod as well by either changing to different rate springs or removing the springs entirely. I like my grandpa shifts so I decided to leave my springs alone. I did however replace the 1-2 piston with the updated version. If you have an Aero I suggest replacing both 1-2 and 2-3 aluminum pistons with stamped steel.
Here is a view of the tranny.



A bottle jack works great for removing the pistons. Put a jack under the cap to release pressure. Use needle nose pliers to remove the snap ring. Lower the jack and remove the piston and springs.

1-2 piston removed. You may notice some wear in the case.
