Jeep Garage  - Jeep Forum banner

Transmission over temp issue...is back again

3K views 8 replies 4 participants last post by  arwood56 
#1 · (Edited)
Hello,

2 weeks ago, on the first really sunny hot day of the year, as I was driving on the highway after 50km, the dreaded Transmission over temp message rang in the electronic dashboard..it felt like something hit me right in the head. I hate it. It causes panic.

I had this issue on hot summer days last year and eventually bought an infrared heat gun off amazon or ebay as suggested by others to see if the tranny oil is really hot. When I bought it, it never occurred again as Fall had just begun and it never really got hot again. It did not occur all winter either.

When it last happened 2 weeks ago, I pulled over, looked and felt the tranny oil, all seemed normal, it was not hot. I went to the dealer and explained him all this, and one of the managers there said to ignore it after asking me questions.

We had performed a bunch of stuff last year such as cleaning some parts but it seemed to not have helped. I also started receiving this message a few days after I had performed a terrible boost on my friend's car which drained my battery. I than had to get it recharged... I'm just wondering if that caused all this...

What would you guys do? Also, where does one point that infrared gun exactly? I have a 2006 Laredo 4.7 V8.

Thanks!
 
See less See more
#2 ·
Best is to point the thermometer to the bottom of the transmission pan. Since it is full with fluid, the lower pan skin should have almost the same temperature as the fluid.
 
#4 ·
No, you have to measure directly on the transmission pan, so from under the jeep. What i remember from mine, was the temperature on average 85° C. Overheat message (this info is for the 5-45RFE on the WJ, but should not differ a lot for the WK), should come on at 135°C.
 
  • Like
Reactions: Laredo2006
#8 ·
When i had an issue similar to this, it was my PCM starting to go out. Just another thought if you're proving that it might actually not be hot.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top