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Unread 11-17-2013, 03:06 PM   #1
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1988 XJ Cherokee 
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Location: Rural Backwoods, Tennessee
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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!!!

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Unread 11-18-2013, 02:25 AM   #2
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1992 XJ Cherokee 
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Transmission control module. Under glove box. Look for fuses for the transmission first.
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Unread 11-19-2013, 03:22 PM   #3
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1989 YJ Wrangler 
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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.
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Unread 11-19-2013, 06:03 PM   #4
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1990 MJ Comanche 
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FIRST place to look is at this fuse for the tCM.
Originally Posted by chris87xj View Post
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