Tranfer case issue - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 06-04-2014, 09:52 PM   #1
Join Date: Jun 2014
Posts: 4
T Fish is on a distinguished road
Tranfer case issue

My transfer case is shot, it is a 231 AMC. can i replace it with any 231 case? The transmission is a A904 automatic which seems to be pretty rare at this time.
T Fish is offline   Quote
Old 06-05-2014, 08:27 AM   #2
Join Date: Aug 2011
Location: north of St.Franisville La.
Posts: 3,449
Nubby55 is on a distinguished road
Send a message via Yahoo to Nubby55
I think you will need a 231j, but the input spline has to be the same as yours.

The Government can not give anything to anybody that it does not first take from someone else !
Nubby55 is offline   Quote
Old 06-05-2014, 12:14 PM   #3
Join Date: Jun 2014
Posts: 4
T Fish is on a distinguished road
Ok thanks, I have a buddy with a 231j I think I can get to try it. If I have to maybe I can frankenstien the 2 cases together to make 1.
T Fish is offline   Quote
Old 06-07-2014, 01:49 AM   #4
0III0forlife's Avatar
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 4,757
0III0forlife is on a distinguished road
You should be able to take the input gear out of yours and install it in the NP231j.

AMC didn't have any t-cases of their own that I know of. If its a 231, its a New Process t-case. It might be a "c" style but I kinda doubt it. Since that has the front driveshaft coming out of the passenger side. If its old enough it might have a NP207 in 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 06-09-2014, 08:07 AM   #5
tjp yj's Avatar
Join Date: Mar 2014
Location: Portage, MI
Posts: 5
tjp yj is on a distinguished road
I am not sure what year you have and engine, but mine is a 93 auto with the 4.0L. Based on mine with the TF999(32RH) trans, the transfer case is 231j with 23 spline and long shaft. The # of splines and length of the input shaft vary - so you can't just grab a TC and assume it will match
tjp yj is offline   Quote

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

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 12:32 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner