post #1 of Old 11-17-2013, 02:06 PM Thread Starter
oldblackxj
Registered User
1988 XJ Cherokee 
 
Join Date: Oct 2006
Location: Rural Backwoods
Posts: 57
88 XJ Transmission Will Not Shift Itself

My 88 XJ automatic trans (AW-4) will only shift if it is manually shifted. I have read that the majority will point to the TPS (throttle position sensor) as the most likely culprit. I have installed a new quality TPS and it did not provide me with the solution to the problem. I would like to get opinions from you with experience on where I should focus my efforts next. Thanks!!!

oldblackxj is offline  
post #2 of Old 11-18-2013, 01:25 AM
uberxj92
Registered User
1992 XJ Cherokee 
 
Join Date: Oct 2012
Location: umatilla
Posts: 1,961
Transmission control module. Under glove box. Look for fuses for the transmission first.

http://www.jeepforum.com/forum/f177/92-xj-sadness-2075657/index2.html
uberxj92 is offline  
post #3 of Old 11-19-2013, 02:22 PM
jokerchief462
Registered User
1989 YJ Wrangler 
 
Join Date: Nov 2010
Location: Sin City
Posts: 2,881
If not the module you may need to drop the pan and change the filter. If the filter is blocked you will not generate the pressure required for it to shift.

89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

AF Jeep Club Tail #184
jokerchief462 is offline  
post #4 of Old 11-19-2013, 05:03 PM
cruiser54
Web Wheeler
 
cruiser54's Avatar
1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott
Posts: 11,019
FIRST place to look is at this fuse for the tCM.
Attached Thumbnails
TCU fuse.JPG  

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

www.cruiser54.com

My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
cruiser54 is offline  
Reply


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 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 On
Refbacks are On

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