AX-15, NP 231 swap Automatic to Manual - JeepForum.com
 
LinkBack Thread Tools
post #1 of 8 Old 03-15-2012, 04:20 PM Thread Starter
JeepComanche89
Registered User
1989 MJ Comanche 
 
Join Date: Jan 2012
Posts: 3,068
AX-15, NP 231 swap Automatic to Manual

I want to start out saying that this forum has been very helpfull to me and I am glad that I joined. Now I have a few questions in reference to a transmission swap from automatic to manual in a 89 comanche with a 4.0. The engine was originally mated to a automatic tranny with a tcase as well. I want to swap in a AX-15 and a NP231 T case. My questions are,

What year transmission and t case do I need in order to have a direct swap, or is there no such thing?

I have a flywheel, pressure plate, and clutch from a 4.0 with a 2wd BA-10 transmission I believe. Will this work on a AX-15?

Also what is my best bet as to where to purchase a AX-15 and NP 231. Would I be better off buying rebuilt units or searching on for a used pair?

Thanks in advance to all that reply.

JeepComanche89 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 03-15-2012, 06:48 PM
97_4popper
Registered User
1990 MJ Comanche 
 
Join Date: Jan 2005
Location: Guston
Posts: 469
I don't know about your flywheel, etc.
I did this swap on my 90 last year.

For what you might pay for the tranny and transfer case, you might want to check into finding a donor XJ.
I picked mine up for $400. Amazed at how many small piece parts I keep pulling from that thing.

I would pick up a new clutch while you have it apart.

You will need the hydraulic clutch master and slave cylinders and the line between them. You'll need the little bracket for the transfer case linkage. They are slightly different from auto to manual.

Go over to comancheclub and check my build thread. (Link in my sig)

I have some pics of the swap I did. Lots of other things I did as well.

Good Luck.

90 MJ 4.0 4X4 5sp LB Pioneer Big Ton.
Truck contains parts from 3 MJs, 2 XJs, 1 TJ and a dishwasher.
http://img.photobucket.com/albums/v1...IMG_0101-2.jpg
Check out comancheclub.com...
My build thread: http://comancheclub.com/forums/viewt...hp?f=7&t=27756
Wifes: 97 TJ 2.5 4X4 5sp 31's stock. . . Slow but; reliable.
97_4popper is offline  
post #3 of 8 Old 03-15-2012, 07:57 PM Thread Starter
JeepComanche89
Registered User
1989 MJ Comanche 
 
Join Date: Jan 2012
Posts: 3,068
Ok thanks for the info, im going to get a new clutch just wondering if the other stuff was compatible. As for your swap how many miles were on the tranny when uou put it in? Is it still stong or showing signs of wear now that you have had it installed for a while. Thanks for the help
JeepComanche89 is offline  
post #4 of 8 Old 03-16-2012, 07:55 PM
97_4popper
Registered User
1990 MJ Comanche 
 
Join Date: Jan 2005
Location: Guston
Posts: 469
Don't know.
The donor had 180K (ish).
I assume the tranny was original.
No problems whatsoever.

90 MJ 4.0 4X4 5sp LB Pioneer Big Ton.
Truck contains parts from 3 MJs, 2 XJs, 1 TJ and a dishwasher.
http://img.photobucket.com/albums/v1...IMG_0101-2.jpg
Check out comancheclub.com...
My build thread: http://comancheclub.com/forums/viewt...hp?f=7&t=27756
Wifes: 97 TJ 2.5 4X4 5sp 31's stock. . . Slow but; reliable.
97_4popper is offline  
post #5 of 8 Old 03-17-2012, 01:02 PM Thread Starter
JeepComanche89
Registered User
1989 MJ Comanche 
 
Join Date: Jan 2012
Posts: 3,068
Ok thanks, I found a 95 cherokee parts truck with a AX-15. Does anyone know if this will fit my 89 4.0? Iv heard that the tailstocks are different in some years then others also that they changed the input shaft after a certain year. I am looking to you the bellhousing also, will this bolt up to my Renix or no? Thanks in advance.
JeepComanche89 is offline  
post #6 of 8 Old 03-18-2012, 05:27 PM Thread Starter
JeepComanche89
Registered User
1989 MJ Comanche 
 
Join Date: Jan 2012
Posts: 3,068
Anyone know if the 95 will fit? I need to know pretty soon if its going to work or not as I have to notify the owner if I want the truck. Any input would be appreciated. Thanks
JeepComanche89 is offline  
post #7 of 8 Old 03-18-2012, 05:51 PM
97_4popper
Registered User
1990 MJ Comanche 
 
Join Date: Jan 2005
Location: Guston
Posts: 469
I think it would, but not sure.
Go over to comancheclub.com.
Everything you want to know about these trucks.

90 MJ 4.0 4X4 5sp LB Pioneer Big Ton.
Truck contains parts from 3 MJs, 2 XJs, 1 TJ and a dishwasher.
http://img.photobucket.com/albums/v1...IMG_0101-2.jpg
Check out comancheclub.com...
My build thread: http://comancheclub.com/forums/viewt...hp?f=7&t=27756
Wifes: 97 TJ 2.5 4X4 5sp 31's stock. . . Slow but; reliable.
97_4popper is offline  
post #8 of 8 Old 03-19-2012, 04:04 PM Thread Starter
JeepComanche89
Registered User
1989 MJ Comanche 
 
Join Date: Jan 2012
Posts: 3,068
Cool. Anyone else know or ever done this swap?
JeepComanche89 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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
The Automatic to Manual Swap Thread Jeepin_XJ_101 XJ Cherokee Technical Forum 104 08-21-2015 04:44 PM
Manual to Automatic Transmission Swap: I may have to do it! bootht99 XJ Cherokee Technical Forum 4 08-05-2010 05:01 PM
manual vs automatic JBE123 XJ Cherokee Technical Forum 18 01-16-2008 12:57 PM
Manual to Automatic Swap bigjohn73 XJ Cherokee Technical Forum 6 10-25-2005 12:03 PM
Manual or automatic dudejepe XJ Cherokee Technical Forum 57 04-29-2004 11:25 AM

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