which "jmod" to follow??

purpony

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I have my separator plate out ready to drill and went back to re-read before i drilled anything... there are a bunch of different jmod pages at different sites-

the crownvic guys have this-
http://www.crownvic.net/tech/4R70Wnotes.pdf

t-bird guys this
http://www.tccoa.com/articles/tranny/transmission/d97.jpg

http://www.tccoa.com/articles/tranny/shiftybusiness.html

and there are others.


I tried searching for jerrys thesis that i read a few years back but cant seem to find it on a google search.

My tranny is a 98.... should i follow the crownvic/marauder guys and drill everything to a .100 - .110 or something else?
 
ok- so i measured the holes in my separator plate and compared to the marauder ones-

#1 = 0.099
#2 = 0.060
#3 = 0.160
#4 = 0.070
#5 = 0.060
#6 = 0.138
#7 = 0.070
#8 = 0.238
#9 = 0.088
#10 = 0.060
#11 = 0.077


the marauder directions say that #2 should = 0.081 and open it to .100....

mine #2 is only 0.060 ....
 
so instead of jmodding, ive been sitting on the couch and reading online....

http://www.tccoa.com/articles/tranny/transmission/page13.shtml

so... this is what i came up with... and still confused on a few of them

#1 - says 95 and Prior, Open hole to 0.160, then chart says open to 0.160 (but doesnt say year). Mine stock measures 0.099.. So open mine to 0.160???????? If so, WHY state 95 and Prior in the first place????

#2 - Mild w/gear - open to 0.100 (mine stock = 0.060)

#3 - Mild w/gear - open to 0.180 (mine stock = 0.160)

#4 - Mild w/gear - open to 0.100 (mine stock =

#5 - Mild w/gear - open to 0.100 (mine stock = 0.060)

#6 - open to 0.125 (if has NO mechanical diode - guessing thats what I have)

#7 - nothing i guess....... (mine stock = 0.071)

#8 - 1996 or newer - NO MOD (mine stock = 0.238)

#9 - .081 to .089 (mine stock 0.088) SO NO MOD i guess

#10 - 0.081 to 0.089 (mine stock = 0.060)

#11 - 0.082 to 0.089 (mine stock = 0.077)

Slot #1 - Cut gasket slot to 0.100 wide



so looking back over this, this is very similar to the 98+ crownvic/marauder, except marauder says to drill #9 and #11 to 0.100 and Jerrys article says to drill 0.081 to 0.089. My 98 #9 is already 0.088 so do I drill #9 and #11 to 0.100 same as Marauder?

This sound correct????
 
Why not list it here for everyone with a '98 to use? ;)

Because it's in pdf form or I would. Explain to me how to get it out of pdf and put it on here and I'll gladly do it. It's only good for 98's and possibly up to 03's

NVM, here it is and it is what you want to go by on any 98 Mark when doing the j-mod. lowered HP and higher HP.

http://www.crownvic.net/tech/4R70Wnotes.pdf
 
Same link. :rolleyes:

Posted to stop the confusion. :rolleyes: Yes, I noticed it was the same link. Now if it would be made into a sticky, people would stop asking and not be looking at up to three different ways of doing it for the 98 when it only takes 2 bits and 2 hands and 2 gaskets and your attention.
 
so last night i went ahead and followed the 98 crownvic one and this is what i did- http://www.crownvic.net/tech/4R70Wnotes.pdf

#1 - left stock = 0.099

#2 - Mild w/gear - open to 0.100 (mine stock = 0.060)

#3 - left stock = 0.160

#4 - Mild w/gear - open to 0.100 (mine stock =

#5 - Mild w/gear - open to 0.100 (mine stock = 0.060)

#6 - left stock = 0.138

#7 - left stock

#8 - left stock = 0.238

#9 - Mild w/gear - open to 0.100

#10 - Mild w/gear - open to 0.093

#11 - Mild w/gear - open to 0.100


ALSO- had to open the hole larger on #4 gasket....

F3LY-7F284-A - Purple - Lower 1-2 Spring
F75Z-7F284-BA - Brown - Upper 1-2 Spring

and left the 2-3 factory spring in place.
 
so last night i went ahead and followed the 98 crownvic one and this is what i did- [url]http://www.crownvic.net/tech/4R70Wnotes.pdf[/URL]

#1 - left stock = 0.099

#2 - Mild w/gear - open to 0.100 (mine stock = 0.060)

#3 - left stock = 0.160

#4 - Mild w/gear - open to 0.100 (mine stock =

#5 - Mild w/gear - open to 0.100 (mine stock = 0.060)

#6 - left stock = 0.138

#7 - left stock

#8 - left stock = 0.238

#9 - Mild w/gear - open to 0.100

#10 - Mild w/gear - open to 0.093

#11 - Mild w/gear - open to 0.100


ALSO- had to open the hole larger on #4 gasket....

F3LY-7F284-A - Purple - Lower 1-2 Spring
F75Z-7F284-BA - Brown - Upper 1-2 Spring

and left the 2-3 factory spring in place.

Driven yet? I would have drilled all holes like it said. That's just me though. Get the flow going everywhere it needs to be going.
 
I did drill all the holes that it stated to drill in the 98 article. It didnt say anything about the others i left stock... should the ones i left stock be drilled to the pre-98 sizes?..

98 instructions just say to drill the following....

Holes #2, #4, #5, #9, #11 – 7/64 drill bit
Hole #10 – 3/32 drill bit



thats where i was kind of confused because the t-bird site says to drill

#1 - says 95 and Prior, Open hole to 0.160, then chart says open to 0.160 (but doesnt say year). Mine stock measures 0.099.. So open mine to 0.160???????? If so, WHY state 95 and Prior in the first place????


#3 - Mild w/gear - open to 0.180 (mine stock = 0.160)

#6 - open to 0.125 (if has NO mechanical diode - guessing thats what I have)

#7 - nothing i guess....... (mine stock = 0.071)

#8 - 1996 or newer - NO MOD (mine stock = 0.238)





SHOULD I GO BACK AND DRILL #1, #3, and what about #6??





I have not driven it yet. Still apart. Still need to drain the converter, bolt up the driveshaft, put the exhaust back on , and finish the tranny pan. I drilled and installed a drain plug in the factory pan, going to weld in a trans temp bung as well. Then powder it and get it in the oven....

Will be driving it this weekend... and ordering a tune from Lonnie.
 
I did drill all the holes that it stated to drill in the 98 article. It didnt say anything about the others i left stock... should the ones i left stock be drilled to the pre-98 sizes?..

98 instructions just say to drill the following....

Holes #2, #4, #5, #9, #11 – 7/64 drill bit
Hole #10 – 3/32 drill bit



thats where i was kind of confused because the t-bird site says to drill

#1 - says 95 and Prior, Open hole to 0.160, then chart says open to 0.160 (but doesnt say year). Mine stock measures 0.099.. So open mine to 0.160???????? If so, WHY state 95 and Prior in the first place????


#3 - Mild w/gear - open to 0.180 (mine stock = 0.160)

#6 - open to 0.125 (if has NO mechanical diode - guessing thats what I have)

#7 - nothing i guess....... (mine stock = 0.071)

#8 - 1996 or newer - NO MOD (mine stock = 0.238)





SHOULD I GO BACK AND DRILL #1, #3, and what about #6??





I have not driven it yet. Still apart. Still need to drain the converter, bolt up the driveshaft, put the exhaust back on , and finish the tranny pan. I drilled and installed a drain plug in the factory pan, going to weld in a trans temp bung as well. Then powder it and get it in the oven....

Will be driving it this weekend... and ordering a tune from Lonnie.

If you drilled all holes in the crown vic article, you are set. I drilled 1, 3 and 6 when I done the 98 trans. That's up to you. I think leaving the springs in was a good choice also. I left out my bottom 1-2 and it was a hard hitter in 2nd, without that bottom spring.
 
Why don't you just use the drill bit sizes you're SUPPOSED to use?!?

I did this jmod on my 95 'Bird several years ago and it's great:

Hole #1 - .160" which is Drill Bit #20 ALL APPLICATIONS (this is the Intermediate Clutch fill)
Hole #2 - .081" mild, .100" more aggressive which is Drill Bits #46 & #39 (this is 1-2 accumulator fill)
Hole #3 - .180" which is Drill Bit #15 ALL APPLICATIONS (this is 2-1 downshift circuit)
Hole #4 - .081 mild, .100" more aggressive (this is Direct Clutch fill)
Hole #5 - .081 NO BIGGER unless you have a 1999- valve body with higher load 2-3 modulator spring (this is also Direct Clutch)
Hole #6 - .125" this is an 1/8" Drill Bit unless you have 1998 (mechanical diode), then you can open this up to slot (use gasket as template, this is Direct Clutch exhaust)
Hole #7 - .125" ALL APPLICATIONS this is for 2-1 manual downshift (if you open this hole any bigger, the rear wheels will momentarily lock when you manually shift from 2-1)
Hole #8 - .238" ALL APPLICATIONS this is 'B' Size Drill Bit (this is for 1993-95 and is Forward Clutch exhaust 3-4 and 4-3 shifts)
Hole #9 - .081" mild, .089" more aggressive Drill Bits #46 & #43 (this is power-on 4-3 downshift)
Hole #10 - .089" Drill Bit #43 (this is just faster reverse engagement the bigger the hole)
Hole #11 - .081" mild, .089" more aggressive (this is power-off 4-3 downshift)

If you're wondering where to get those tiny wire # size drill bits, hobby shops have them and a complete set is less than $10.
 
Why don't you just use the drill bit sizes you're SUPPOSED to use?!?

I did this jmod on my 95 'Bird several years ago and it's great:

Hole #1 - .160" which is Drill Bit #20 ALL APPLICATIONS (this is the Intermediate Clutch fill)
Hole #2 - .081" mild, .100" more aggressive which is Drill Bits #46 & #39 (this is 1-2 accumulator fill)
Hole #3 - .180" which is Drill Bit #15 ALL APPLICATIONS (this is 2-1 downshift circuit)
Hole #4 - .081 mild, .100" more aggressive (this is Direct Clutch fill)
Hole #5 - .081 NO BIGGER unless you have a 1999- valve body with higher load 2-3 modulator spring (this is also Direct Clutch)
Hole #6 - .125" this is an 1/8" Drill Bit unless you have 1998 (mechanical diode), then you can open this up to slot (use gasket as template, this is Direct Clutch exhaust)
Hole #7 - .125" ALL APPLICATIONS this is for 2-1 manual downshift (if you open this hole any bigger, the rear wheels will momentarily lock when you manually shift from 2-1)
Hole #8 - .238" ALL APPLICATIONS this is 'B' Size Drill Bit (this is for 1993-95 and is Forward Clutch exhaust 3-4 and 4-3 shifts)
Hole #9 - .081" mild, .089" more aggressive Drill Bits #46 & #43 (this is power-on 4-3 downshift)
Hole #10 - .089" Drill Bit #43 (this is just faster reverse engagement the bigger the hole)
Hole #11 - .081" mild, .089" more aggressive (this is power-off 4-3 downshift)

If you're wondering where to get those tiny wire # size drill bits, hobby shops have them and a complete set is less than $10.

Because the 98's seem to be different and a grey area from what im gathering.

What i want to know is, why doesnt this ---> http://www.crownvic.net/tech/4R70Wnotes.pdf say anything about #1, #3, and #6??????????

I found this ..... http://www.stangnet.com/images/stories/docs/sn95_TSBs/97-21-10.pdf which does state that the 1998 has the mechanical diode, therefore # 6 should be slotted... WHO HAS slotted theirs? I have never heard or seen pictures of anyone ever doing this.....
 
Because the 98's seem to be different and a grey area from what im gathering.

What i want to know is, why doesnt this ---> http://www.crownvic.net/tech/4R70Wnotes.pdf say anything about #1, #3, and #6??????????

I found this ..... http://www.stangnet.com/images/stories/docs/sn95_TSBs/97-21-10.pdf which does state that the 1998 has the mechanical diode, therefore # 6 should be slotted... WHO HAS slotted theirs? I have never heard or seen pictures of anyone ever doing this.....

#1 should be .160" drill bit #20 and #3 should be .180" drill bit #15; that is for any year, any application.

I agree with your statement about the slot thing, I've only done a few of these j-mods and I've never done it! lol Course, I haven't done a 98- tranny year, either (It won't be long, I've got my eye on a 2003 Marquis tranny right now, but I've been thinking about a long-tail shaft from a Town Car with a shortened aluminum driveshaft too which is why I haven't bought it yet)...
 
Just have someone who knows what they are doing take care of it like these guys did.

If you don't understand what's going on, don't mess with it rather than keep crying confused, confused!
 
well i will see how it works with what i did and ill stop asking questions-
 

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