Looking at a 94 xj, have a 91 yj. - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 01-03-2016, 01:39 PM
Thread Starter
  #1
Jeeper
 
Arcticjeep's Avatar
 
Join Date: Jul 2014
Location: Michigan
Posts: 217
Looking at a 94 xj, have a 91 yj.

I'm going to look at a 94 xj, for $500 bucks. Supposed to need syncro's. What I want to know is, can I use the trans from the xj in my yj. Both are the 4.0L

Arcticjeep is offline   Quote
Old 01-03-2016, 01:48 PM   #2
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 4,757
Yep, they should both be Aisin AX15's.

The only thing you will have to do is re-drill the rear flange on the trans to accept your YJ's t-case. The XJ's t-case is clocked down further on the driver's side than what a YJ is. A YJ's t-case is more level in order to get that big skid plate up in there, whereas the XJ doesn't have the big skid under it.

__________________
'87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote
Old 01-03-2016, 03:01 PM   #3
Jeeper
 
bc3_Jeep's Avatar
 
Join Date: Nov 2010
Location: NE corner of Iowa
Posts: 1,738
Considering both the 94 AND the 91 are YJs would there even BE a difference.............???
__________________
"For Gawd's sake, put a RELAY in there or you could burn the whole damn Jeep to the ground" ...this quote brought to you by people who do not understand the law.....Kirchoff's, Ohm's, or Faraday's.
Violation of KISS shall always ring false in TRUE engineering. - ME___
Had 75CJ5, 89YJ, 93YJ. Have 82CJ7 & 95YJ____Not one burnt yet due to lack of relays.
bc3_Jeep is offline   Quote
Sponsored Links
Advertisement
 
Old 01-03-2016, 03:27 PM
Thread Starter
  #4
Jeeper
 
Arcticjeep's Avatar
 
Join Date: Jul 2014
Location: Michigan
Posts: 217
I forgot to state, that my yj is an automatic, and the xj is a manual. Do the computers have anything to do with the trans on these years?
Arcticjeep is offline   Quote
Old 01-03-2016, 03:53 PM   #5
Supporting Member

5-Year WF Supporting Member
 
DREDnot's Avatar
 
Join Date: Jul 2014
Location: Phoenix, AZ
Posts: 3,236
Quote:
Originally Posted by bc3_Jeep View Post
Considering both the 94 AND the 91 are YJs would there even BE a difference.............???
The 94 is an XJ, The 91 is a YJ
__________________
'91 YJ Sahara 4.0L/AX-15/NP231, D30/D35 @3.07
'12 KK Cherokee 3.7L/42RLE/MP1522,D30M/[email protected]
Emissions testing? YES
DREDnot is offline   Quote
Old 01-03-2016, 04:55 PM   #6
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 4,757
Quote:
Originally Posted by Arcticjeep View Post
I forgot to state, that my yj is an automatic, and the xj is a manual. Do the computers have anything to do with the trans on these years?
The computer doesn't have anything to do with the trans in the YJ.

You are looking at an extensive swap. Going from an auto to a manual would require a new set of pedals in the cab, and those have to be from a YJ, the ones in the XJ are not compatible.

You will need the XJ's t-case as well, and clock it to fit in the YJ. Or, take the input gear out of your t-case and put in the gear from the t-case out of the XJ. Either way, the bolt hole pattern on the trans needs re-drilled to clock the t-case up to fit in the YJ skid.

And you need a different solenoid on the firewall, since the neutral safety switch for the auto is what supplies ground to the solenoid in order to start.

Then you will have to splice a different connector onto the wiring for the reverse lights. The switch for them is on the other side of the trans.
__________________
'87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote
Old 01-04-2016, 09:40 AM
Thread Starter
  #7
Jeeper
 
Arcticjeep's Avatar
 
Join Date: Jul 2014
Location: Michigan
Posts: 217
Quote:
Originally Posted by 0III0forlife View Post
The computer doesn't have anything to do with the trans in the YJ. You are looking at an extensive swap. Going from an auto to a manual would require a new set of pedals in the cab, and those have to be from a YJ, the ones in the XJ are not compatible. You will need the XJ's t-case as well, and clock it to fit in the YJ. Or, take the input gear out of your t-case and put in the gear from the t-case out of the XJ. Either way, the bolt hole pattern on the trans needs re-drilled to clock the t-case up to fit in the YJ skid. And you need a different solenoid on the firewall, since the neutral safety switch for the auto is what supplies ground to the solenoid in order to start. Then you will have to splice a different connector onto the wiring for the reverse lights. The switch for them is on the other side of the trans.
I was afraid of this. Was hoping it would be a little easier. But still for $500 bucks. I don't think I could go wrong. If anything, I could turn around and part it out. Not sure if it would be worth doing the swap, knowing the trans still needs syncro's. What are your thoughts, guys and gals?
Arcticjeep is offline   Quote
Old 01-04-2016, 03:28 PM   #8
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 4,757
Quote:
Originally Posted by Arcticjeep View Post
I was afraid of this. Was hoping it would be a little easier. But still for $500 bucks. I don't think I could go wrong. If anything, I could turn around and part it out. Not sure if it would be worth doing the swap, knowing the trans still needs syncro's. What are your thoughts, guys and gals?
You can get well over $500 for the parts if you decide to go that route.

I wouldn't buy the vehicle for the trans, if the trans needed work. You can buy a new AX15 for around $1500, and it will cost you half that to have that one rebuilt (unless you can do your own work).

My AX15 came out of a 97 TJ, I purchased the TJ because he rolled it over, I got it for cheap and took all the parts I wanted off of it, and sold some to fellow TJ owners (parts that were TJ specific) and then scrapped the rest.

But you would still need the swing pedals from a YJ to begin the transformation from auto to manual.
__________________
'87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote
Old 01-09-2016, 10:40 PM
Thread Starter
  #9
Jeeper
 
Arcticjeep's Avatar
 
Join Date: Jul 2014
Location: Michigan
Posts: 217
Well life has reared it ugly head yet again. Not sure if I will be able to swing the money for the xj. Will keep you all posted.

Arcticjeep is offline   Quote
Reply

Thread Tools

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 Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 10:54 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.