NP231 Question - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 02-19-2014, 06:31 PM Thread Starter
aviationofficer
Registered User
1987 YJ Wrangler 
 
Join Date: Aug 2013
Location: Stanwood
Posts: 43
NP231 Question

I've got an '87 Wrangler. I want to replace the original NP207 with an NP231. I found one out of a 2002 Wrangler that comes with a SYE. Will it work in my '87?

aviationofficer is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 02-19-2014, 06:58 PM
jsipe007
Registered User
1994 YJ Wrangler 
 
Join Date: Oct 2011
Location: Reno
Posts: 491
I believe it is possible but I am not 100% sure. If it is we are going to need a bit more info. What transmission do you have and what was the 231 mated to? There are many different input shafts for the 231 family.
jsipe007 is offline  
post #3 of 8 Old 02-19-2014, 07:11 PM Thread Starter
aviationofficer
Registered User
1987 YJ Wrangler 
 
Join Date: Aug 2013
Location: Stanwood
Posts: 43
Sorry about that. I have a TF999 which i believe has a 23 spline output shaft. The t-case i'm looking at is also for a 23 spline.
aviationofficer is offline  
post #4 of 8 Old 02-19-2014, 07:26 PM
superj
Registered User
 
Join Date: Mar 2008
Location: corpus christi
Posts: 7,057
Yours had a 207? Mine has a 231 stock on the tf999. You checked the tag? I thought I had a 207 till I actually got under and looked at it

I don't feel like working on anything at this time so i sold my yj.
superj is offline  
post #5 of 8 Old 02-19-2014, 07:37 PM Thread Starter
aviationofficer
Registered User
1987 YJ Wrangler 
 
Join Date: Aug 2013
Location: Stanwood
Posts: 43
Yeah i checked the tag. I thought it had a 231 till i looked.
aviationofficer is offline  
post #6 of 8 Old 02-21-2014, 10:25 AM Thread Starter
aviationofficer
Registered User
1987 YJ Wrangler 
 
Join Date: Aug 2013
Location: Stanwood
Posts: 43
bump
aviationofficer is offline  
post #7 of 8 Old 02-21-2014, 10:32 AM
jsipe007
Registered User
1994 YJ Wrangler 
 
Join Date: Oct 2011
Location: Reno
Posts: 491
I dug up this link. Might be helpful.

http://www.pirate4x4.com/forum/jeep-...gth-tf999.html

If the spline count is the same I can only imagine length being the issue.

Here is another link

http://www.bc4x4.com/faqs/yj.cfm?cat=6&faqid=141
jsipe007 is offline  
post #8 of 8 Old 02-22-2014, 09:57 PM
jeepguy85
Web Wheeler
1987 YJ Wrangler 
 
Join Date: Jan 2009
Location: Kingsport, Tennessee
Posts: 1,154
Quote:
Originally Posted by aviationofficer
Yeah i checked the tag. I thought it had a 231 till i looked.
If you can, separate them and count the number of splines if you are not 100% sure. IF it is a 23 spline input, run it unless you plan on an SYE. The only advantages a 231 offers over the 207 are better aftermarket support for SYEs, etc and a 2.72 gear ratio vs the 2.62 on the 207.

EDIT: I just reread your original post. The 87 uses a mechanical speedo. The 2002 TC will be electric. If the spline counts match up, you will still need to adapt the new TC to a mechanical speedo setup.

Quote:
Originally Posted by Exparrot View Post
"When Chuck Norris drives, Chuck Norris controls the radio..."
Quote:
Originally Posted by HurricaneRZA View Post
Mean Max created Chuck Norris with some spare parts, two trac bars and some differential fluid.
jeepguy85 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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 post new threads
You may 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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

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