J-Mod Question - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 13 (permalink) Old 03-02-2007, 06:34 PM Thread Starter
 
Join Date: Aug 2003
Posts: 100
J-Mod Question

On the j mod what exactly is it that will make it bark the 1-2 shift? and will it still make it do that with a stock engine?
92TbrdSport is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 03-02-2007, 06:46 PM
Seasoned PostWhore
 
The Great Obucina's Avatar
 
Join Date: Oct 2002
Location: palm beach county
Age: 38
Posts: 9,966
Send a message via AIM to The Great Obucina
do what it says in A Trains write up.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
The Great Obucina is offline  
post #3 of 13 (permalink) Old 03-05-2007, 08:30 PM Thread Starter
 
Join Date: Aug 2003
Posts: 100
well, I did it and I cannot bark the 1-2 shift. That really sucks!!! It does shift much quicker and better but still no 1-2 bark. Any ideas? I thought that was what the jmod would do? But that is why I asked it before I did it.....
92TbrdSport is offline  
Sponsored Links
Advertisement
 
post #4 of 13 (permalink) Old 03-05-2007, 08:45 PM
Seasoned PostWhore
 
The Great Obucina's Avatar
 
Join Date: Oct 2002
Location: palm beach county
Age: 38
Posts: 9,966
Send a message via AIM to The Great Obucina
Quote:
Originally Posted by 92TbrdSport View Post
well, I did it and I cannot bark the 1-2 shift. That really sucks!!! It does shift much quicker and better but still no 1-2 bark. Any ideas? I thought that was what the jmod would do? But that is why I asked it before I did it.....
did you do the light blue top spring and no bottom spring? The other option is a stiffer top spring, i cant remember if its the purple one or the brown one....

but also, if you get a chip from say...lonnie, tell him you did thee j mod and he can tweak the line pressure accordingly so that you eat up tires quicker than you typically should.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
The Great Obucina is offline  
post #5 of 13 (permalink) Old 03-05-2007, 09:02 PM Thread Starter
 
Join Date: Aug 2003
Posts: 100
Damn it all to hell, what is the p/n for the light blue spring? I put the stock spring in it and left a bottom spring in it too. Thanks for your help.
92TbrdSport is offline  
post #6 of 13 (permalink) Old 03-05-2007, 09:13 PM
Seasoned PostWhore
 
The Great Obucina's Avatar
 
Join Date: Oct 2002
Location: palm beach county
Age: 38
Posts: 9,966
Send a message via AIM to The Great Obucina
Quote:
Originally Posted by 92TbrdSport View Post
Damn it all to hell, what is the p/n for the light blue spring? I put the stock spring in it and left a bottom spring in it too. Thanks for your help.

its listed in the parts list in a Trains article, but Ford has most likely revised the PN, check with Jason to be sure.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
The Great Obucina is offline  
post #7 of 13 (permalink) Old 03-05-2007, 09:37 PM Thread Starter
 
Join Date: Aug 2003
Posts: 100
Thanks for the help, stupid me I should have triple checked. Guess ill order the correct spring and drop the pan tomorow night. Thanks again.
92TbrdSport is offline  
post #8 of 13 (permalink) Old 03-06-2007, 08:08 AM
2nd Gear Poster
 
88grandmarq's Avatar
 
Join Date: Jul 2003
Location: North Georgia
Posts: 111
Send a message via AIM to 88grandmarq Send a message via Yahoo to 88grandmarq
read here for spring rates and current part #'s

http://www.crownvic.net/ubbthreads/s...b=5&o=&fpart=1
88grandmarq is offline  
post #9 of 13 (permalink) Old 03-06-2007, 08:55 AM
Seasoned PostWhore
 
Darrin's Avatar
 
Join Date: Aug 2002
Location: Camby, IN 46113
Age: 54
Posts: 2,976
A trains writeups are mostly the how-to stuff and not the best for specific details. Kinda like Cliff's notes lite.

If you want to know exactly what to do look through the transmission article by Jerry. Its the first article in the transmission section called "Ford OD transmissions 101".

I mean, Jerry was one of the designers of the transmission after all.

But do not use that light blue spring for what you want. Use the brown spring that is Ford part number F75Z-7F284-BA. They cost less than $5 and its exactly what you want if you want a hard shift. Dont use a bottom spring in the 1-2 and take the spring out of the 2-3 for firm shifts as well.

Also, if you drill out your plate very far you will likely need a tune to move the shift points back up where they should be.

Darrin

01 F150 5.4L 4x4 and a 98 Mustang GT vert sitting engineless and without transmission or converter


All my vehicles tuned by BC Automotive (me)

Darrin is offline  
post #10 of 13 (permalink) Old 03-06-2007, 10:23 AM
Seasoned PostWhore
 
The Great Obucina's Avatar
 
Join Date: Oct 2002
Location: palm beach county
Age: 38
Posts: 9,966
Send a message via AIM to The Great Obucina
i used the light blue spring when i did the j mod about 6 years ago and it chirped the tires right off the bat.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
The Great Obucina is offline  
post #11 of 13 (permalink) Old 03-06-2007, 01:42 PM
Seasoned PostWhore
 
Darrin's Avatar
 
Join Date: Aug 2002
Location: Camby, IN 46113
Age: 54
Posts: 2,976
Light blue spring = > $30

Brown spring = < $5

Darrin

01 F150 5.4L 4x4 and a 98 Mustang GT vert sitting engineless and without transmission or converter


All my vehicles tuned by BC Automotive (me)

Darrin is offline  
post #12 of 13 (permalink) Old 03-06-2007, 01:59 PM
Seasoned PostWhore
 
The Great Obucina's Avatar
 
Join Date: Oct 2002
Location: palm beach county
Age: 38
Posts: 9,966
Send a message via AIM to The Great Obucina
Quote:
Originally Posted by Darrin View Post
Light blue spring = > $30

Brown spring = < $5

Darrin
i paid alot less years ago....something like 12$ for the blue spring.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
The Great Obucina is offline  
post #13 of 13 (permalink) Old 03-06-2007, 04:43 PM
Seasoned PostWhore
 
Darrin's Avatar
 
Join Date: Aug 2002
Location: Camby, IN 46113
Age: 54
Posts: 2,976
I am wrong on the price of that light blue spring. I thought it was the stupid high priced one and called my Ford guy to check. It costs just about the same as the brown spring apparently.

Darrin

01 F150 5.4L 4x4 and a 98 Mustang GT vert sitting engineless and without transmission or converter


All my vehicles tuned by BC Automotive (me)

Darrin is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome