Thanks for the replys. I ended up splicing a wire onto the speed
sensor lead going into the TCU connector. I found on old anolog meter
and cliped it onto the speed sensor wire. I have been driving around
for the last week trying to get the shifting to fail and finally it
did. Looks like the speed sensor is getting stuck closed which is
leaving a constant ground on the TCU speed sensor pin. After it sits
for a wile it opens and operates normally. How difficult would it be
to change the sensor. Looks like I have to drop the short drive shaft
going into the transfer case. Has anyone replaced a sensor?? thanks

On Thu, 26 Feb 2004 08:33:49 -0500, Mike Romain <romainm@sympatico.ca>
wrote:

>No, but you might be able to fix shifting issues by cleaning the
>connections on the TPS. Those are known to get dirty and send bad
>signals to the TCU.
>
>Also a badly wired CB or other transmitter can interfere with the shift
>module.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>downhill101@comcast.net wrote:
>>
>> Anyone know where I could fid a TCU for a 89 jeep Cherokke

 

Thanks for the replys. I ended up splicing a wire onto the speed
sensor lead going into the TCU connector. I found on old anolog meter
and cliped it onto the speed sensor wire. I have been driving around
for the last week trying to get the shifting to fail and finally it
did. Looks like the speed sensor is getting stuck closed which is
leaving a constant ground on the TCU speed sensor pin. After it sits
for a wile it opens and operates normally. How difficult would it be
to change the sensor. Looks like I have to drop the short drive shaft
going into the transfer case. Has anyone replaced a sensor?? thanks

On Thu, 26 Feb 2004 08:33:49 -0500, Mike Romain <romainm@sympatico.ca>
wrote:

>No, but you might be able to fix shifting issues by cleaning the
>connections on the TPS. Those are known to get dirty and send bad
>signals to the TCU.
>
>Also a badly wired CB or other transmitter can interfere with the shift
>module.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>downhill101@comcast.net wrote:
>>
>> Anyone know where I could fid a TCU for a 89 jeep Cherokke

 

Thanks for the replys. I ended up splicing a wire onto the speed
sensor lead going into the TCU connector. I found on old anolog meter
and cliped it onto the speed sensor wire. I have been driving around
for the last week trying to get the shifting to fail and finally it
did. Looks like the speed sensor is getting stuck closed which is
leaving a constant ground on the TCU speed sensor pin. After it sits
for a wile it opens and operates normally. How difficult would it be
to change the sensor. Looks like I have to drop the short drive shaft
going into the transfer case. Has anyone replaced a sensor?? thanks

On Thu, 26 Feb 2004 08:33:49 -0500, Mike Romain <romainm@sympatico.ca>
wrote:

>No, but you might be able to fix shifting issues by cleaning the
>connections on the TPS. Those are known to get dirty and send bad
>signals to the TCU.
>
>Also a badly wired CB or other transmitter can interfere with the shift
>module.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>downhill101@comcast.net wrote:
>>
>> Anyone know where I could fid a TCU for a 89 jeep Cherokke