Took my Cherokee to the outer banks to do some fishing and drove it in the
sand until noticing it was overheating. Immediately stopped and let it cool
down and realized I was losing coolant. Replaced the water pump and
thermostat after carefully driving it home but now the transmission shifts
from first to overdrive if I have it in D, or first to third if in 3. Fluid
level is normal, and other than the shifting problem it runs fine. has
anybody seen this problem and is there a fix (other than replacing the
transmission)?
thanks,
JC

 

Hi JC,
I betting your Throttle Position Sensor is drench in coolant, try
blowing it out with WD-40 and air pressure:
http://members.***.net/wilsond/tb/tb.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

Hi JC,
I betting your Throttle Position Sensor is drench in coolant, try
blowing it out with WD-40 and air pressure:
http://members.***.net/wilsond/tb/tb.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

Hi JC,
I betting your Throttle Position Sensor is drench in coolant, try
blowing it out with WD-40 and air pressure:
http://members.***.net/wilsond/tb/tb.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

Hi JC,
I betting your Throttle Position Sensor is drench in coolant, try
blowing it out with WD-40 and air pressure:
http://members.***.net/wilsond/tb/tb.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

The TPS on the throttle body controls shift points. When they get
contaminated with stuff like salt water or coolant, they can act
strange. A good spray clean with contact cleaner or WD40 on the TPS
connection might be needed.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

The TPS on the throttle body controls shift points. When they get
contaminated with stuff like salt water or coolant, they can act
strange. A good spray clean with contact cleaner or WD40 on the TPS
connection might be needed.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

The TPS on the throttle body controls shift points. When they get
contaminated with stuff like salt water or coolant, they can act
strange. A good spray clean with contact cleaner or WD40 on the TPS
connection might be needed.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC

 

The TPS on the throttle body controls shift points. When they get
contaminated with stuff like salt water or coolant, they can act
strange. A good spray clean with contact cleaner or WD40 on the TPS
connection might be needed.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

JC wrote:
>
> Took my Cherokee to the outer banks to do some fishing and drove it in the
> sand until noticing it was overheating. Immediately stopped and let it cool
> down and realized I was losing coolant. Replaced the water pump and
> thermostat after carefully driving it home but now the transmission shifts
> from first to overdrive if I have it in D, or first to third if in 3. Fluid
> level is normal, and other than the shifting problem it runs fine. has
> anybody seen this problem and is there a fix (other than replacing the
> transmission)?
> thanks,
> JC