Comanche MJ 2wd to 4wd conversion question - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 12-13-2002, 07:12 PM
FuriousGeorge
Guest
 
Posts: n/a
Comanche MJ 2wd to 4wd conversion question

Step brother gave me his 89 mj. Its a 2wd and i want to make it my 1st rock crawler.What tcase would bolt up to the 4.0? im going to leaf spring-over , any problems foreseen? any advice?
thanks Matt
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 12-13-2002, 08:03 PM
Official Historian
 
WILL's Avatar
 
Join Date: Sep 1999
Location: Hot Springs, AR
Posts: 8,339
Thanks: 1
Thanked 5 Times in 5 Posts
 
Re: Comanche MJ 2wd to 4wd conversion question

There's an easier way to convert the front end than a leaf spring conversion. If you look under the front, the front axle that is there is just a tube without a differential. All you need to do for the front is swap in an XJ or MJ front axle and it's bolt on. As for the transfer case, I'm not sure what will have to be done. The easiest way would probably be to look on ebay for a tranny/transfer case auction and just swap them in.
WILL is offline  
post #3 of (permalink) Old 12-14-2002, 07:44 AM
 
Join Date: Feb 2001
Posts: 543
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Comanche MJ 2wd to 4wd conversion question

i did this exact swap by buying a rusted out xj cherokee with the same gear ratio as my mj. everything is a direct bolt on. the only thing i had to have done was to cut down my rear drive shaft. i also went from auto to standard at the same time. definately the easiest and most reliable.
yjdave is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 12-14-2002, 01:32 PM
FuriousGeorge
Guest
 
Posts: n/a
Re: Comanche MJ 2wd to 4wd conversion question

what kind of tcase and trans did u end up using?
is it left or right side pumpkin on front?
also, are the transfer case and transmission good 4 rockcrawling w/ 36x12.50 and 456gears?
thanks matt
post #5 of (permalink) Old 12-14-2002, 05:05 PM
 
Join Date: Aug 2000
Posts: 4,282
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Comanche MJ 2wd to 4wd conversion question

my buddy dug has a kickin mj that started out life as a 2wd daily driver. Shoot him an e-mail at [email protected] He has a propane injected small block, sm465 and a fliped d300 in there though he's still running the d30/35 combo and 31's though some day it will be huge and on 1 tons.

BarrelRoll
Jeeper99xj is offline  
post #6 of (permalink) Old 12-15-2002, 07:44 AM
 
Join Date: Feb 2001
Posts: 543
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Comanche MJ 2wd to 4wd conversion question

i used the tranny and case from the donor cherokee. it was an ax5 or 15, and a np231 case. i used everything from the cherokee. the trans and trans case, with shifter and linkage, the vacuum lines and harness, the computer, the entire front end including the brakes, locating arms, front drive shaft everything... i had the original drive shaft from the mj cut down for $30.. my mj was a long bed.. there is a chance that if you have the short bed the srear shaft from an xj may fit, but i,m not sur. i also added a 3 inch lift while i had everything apart.
yjdave is offline  
post #7 of (permalink) Old 12-15-2002, 07:55 AM
 
Join Date: Jul 2001
Posts: 337
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Comanche MJ 2wd to 4wd conversion question

An MJ rockcrawler, you're my hero. I'm using my parts MJ to do this swap on a friend's 2wd XJ as we speak. THe transfer case should do okay with 36" tires, but the tranny and axles are not going to hold up to rockcrawling. I'd suggest swapping in a new t-case/tranny combo if you're going to be crawling. Either an NV4500 or an SM465 would be a good swap, the 465 would be the better choice I think if you're not planning on doing a lot of highway with this thing. Bigger axles will be absolutely necessary, and I hope you're talking about the rear leaves, because the front end of those things flex so damn well! Hope this helps a little.

~Jay
SuburbanAssault is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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