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Unread 08-26-2013, 05:09 PM   #1
worsrider4047
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1998 ZJ 
 
Join Date: Jul 2009
Location: cedarburg, Wisconsin
Posts: 195
t-case/speedo issue

So on my niner, I replace the t case with a 242 about 2 years ago, over the weekend I replaced that with a 231 out of a 93 Cherokee, everything is in and bolted up. So on my test drive the speedo didn't work and it wouldn't shift out of 1st gear
About a year ago I got a code for output shaft sensor, but being everything worked I didn't do anything about it, im still getting the code after the swap so I got a new sensor that goes on the output of the case, that still didn't work
Any thoughts on the issue? I'm quite puzzled (I do have another sensor on order in case the first one I got was bad )

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Unread 08-26-2013, 05:22 PM   #2
newfieZJ
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1995 ZJ 
 
Join Date: May 2008
Location: , Alberta
Posts: 6,472
You sure it's not the trans output speed sensor you need ? What code ?

I would first try removing it and cleaning it . it's a magnetic pick up type . They get plenty stuck to them . I always just clean them when doing a fluid change . Beware , you will loose fluid removing this sensor IIRC
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Unread 08-26-2013, 05:48 PM   #3
worsrider4047
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Join Date: Jul 2009
Location: cedarburg, Wisconsin
Posts: 195
I did pick one up, haven't put it in yet but I'll try to clean it before I replace, still strange to me that it worked that morning but not that night after the swap
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Unread 08-26-2013, 05:59 PM   #4
newfieZJ
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Strange ? Not really . Lets assume this sensor is dirty , signal could get impaired intermittently/partially . If it sat it might pick up more and stop working .

What was the code ???

Just so we are clear

Trans speed sensor in the trans overdrive unit
dsc06191.jpg

speed sensor on the t-case
dsc06192.jpg
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Unread 08-26-2013, 06:10 PM   #5
worsrider4047
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1998 ZJ 
 
Join Date: Jul 2009
Location: cedarburg, Wisconsin
Posts: 195
The code was for the output shaft sensor
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Unread 08-26-2013, 07:14 PM   #6
worsrider4047
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1998 ZJ 
 
Join Date: Jul 2009
Location: cedarburg, Wisconsin
Posts: 195
I cleaned it and it now shifts, but still no speedo
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Unread 08-26-2013, 08:16 PM   #7
newfieZJ
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Join Date: May 2008
Location: , Alberta
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Great , 1 down , one to go .

You tried a different speed sensor correct ? You may have it indexed incorrectly . 2 settings only so I would try to reclamp it in the other setting . Unclamp , turn the sensor , reclamp .
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Unread 08-26-2013, 08:24 PM   #8
worsrider4047
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1998 ZJ 
 
Join Date: Jul 2009
Location: cedarburg, Wisconsin
Posts: 195
Ha I bet that's it, I'll try tomorrow after work and let you know the answer, thanks again for the help
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