J-Mod

[Marauder Rick]

Okay, Just to make sure im not missing the concept. When all said and done, the J-mod is only getting rid of the valve body's accumulator springs, and drilling out specific holes in the separator plate. This sounds hella...hella easy and i want to make sure im not missing the step that says, " chew on the valve body until you make teeth marks, or teeth".

[ImpalaSlayer]

you must also top off your blinker fluid ;)

[justbob]

Yes it is that simple, just have the two required gaskets, 9 qts of oil, and two drill bits ready. Taking my sweet time on my back, it was a two hour job and welllllllll worth it! Good luck.

[LANDY]

does the j-mod makes the tranny shift, how?

[justbob]

Best word is crisp. Won't break your neck, but nice and firm.

[Krytin]

Just make sure that after you do the J-mod (and you really should do the J-mod) if you ever tune/flash the program you do not increase the line pressure on the transmission programing. It would be redundant to the J-mod and make the shifts too hard.

[Glenn]

K-man is correct - you must check your line pressures after the J-mod. My line pressure was maxed out at 125#. It should have been about 99#. The 1-2 shift was hitting a little too firm. I had Dennis Reinhart lower the 1-2 shift schedule at cruise speed to stock and WOT to max pressure. It works fine.

Glenn :burnout:

[ntd]

The separator plate mod improves fluid flow resulting in longer trans life. The removal of the springs will increase shift firmness. Some people don't like how hard the 1-2 shift is it will bark on wot, some will leave the 1-2 spring in but I would highly recommend modding the separator plate and removing the 2-3 spring. read this http://www.mercurymarauder.net/forums/showthread.php?t=54191 (http://www.mercurymarauder.net/forums/showthread.php?t=54191)

[Marauder Rick]

is there any way to find out what your line pressure is without having a PCM flash done? Is there a tool or something that i can just hook up to my line?

[252life]

After you have done the j mod, you need a hand held tuner X-Cal 3 for example, with the shift line pressure adjustment enabled, then you can fine tune it to your personal preference.

[ntd]

On the left side of the trans at the front there is a 11mm plug in the trans. You will need a trans pressure gauge

[Marauder Rick]

i have an XCal 2. Will that also tell me, or do i need the 3?

[justbob]

xcal 2 is fine, as long as the shift pressure was left adjustable from whoever tuned it. I was lucky because my trilogy chip has the line pressure set very low. No head banging, except the for the music.