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Unread 09-09-2013, 11:07 AM   #1
cablito
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Transmission Over Temperature

I have a Jeep Cherokee Sport 3.7 2008, with 50.000 Km on it.

I have driven about 3.000 Km since I bought it mostly on roads leading to mountain cities.

When I am driving even if its a steep climb during a 20km road uphill high speed lane, not a problem.

If I drive 200Km on flat roads, in the speed limit which is 120 Km/h, also no problem.

Now if I go on trails, and its steep after sometime, probably 30 minutes, I get a transmission over temperature warning. If I turn off the car and on again, it instantly goes away. I usually pull over to the side of the trail and with the engine running let it cool down a bit before turning the car off.

The mechanic has "passed" the scanner and said he found nothing.

I've read somewhere in the forums there seems to be a bug on this sensor, is that true?

If anyone has experience with this, I thank in advance for the feedback.

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Unread 09-09-2013, 11:53 AM   #2
lfhoward
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Here is a thread that may help. http://www.jeepforum.com/forum/f292/...ating-1572000/ You may also want to check that your radiator is free from obstructions, like mud, grass seeds, insects, etc.
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Unread 09-11-2013, 03:00 PM   #3
cablito
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Thanks for your response.

So it seems to be in line with what I've read everywhere; the gearbox does get hot when put under stress, to the point where there is a specific kit to deal with that.

Radiator is perfectly clean outside and inside I assume, due to the color of the fluid.

What intrigues me is that the kind of trail I am going to are really moderate so far, nothing a regular car would not handle on a dry day.

It has 50.000 km on it, and transmission oil change on manual 60.000, so I am planing on doing it now just to be sure. One never knows how much the last owner pushed it or if he hasn't ignored the warning and kept pushing it "frying" the oil, but the car show no signs of being abused.

I am going to do the same trail this weekend after the oil change, so I will have good comparison for before and after the change.
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Unread 09-11-2013, 08:47 PM   #4
Poncherello
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There are couple of other things to do if the issue continues. Keep the tow haul switch on so it stays out of overdrive, you can purchase and install and transmission cooler same as they use on Liberty's that have the tow package and a mechanical fan and clutch assembly also part of the liberty tow package, it help keep things cooler under the hood. When you change your trans fluid make sure you use ATF plus 4.

Good Luck
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Unread 09-12-2013, 03:18 PM   #5
Ted15
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Quote:
Originally Posted by Poncherello
There are couple of other things to do if the issue continues. Keep the tow haul switch on so it stays out of overdrive, you can purchase and install and transmission cooler same as they use on Liberty's that have the tow package and a mechanical fan and clutch assembly also part of the liberty tow package, it help keep things cooler under the hood. When you change your trans fluid make sure you use ATF plus 4.

Good Luck
I think he said he has a manual
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Unread 09-12-2013, 06:31 PM   #6
tjkj2002
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Quote:
Originally Posted by Ted15 View Post
I think he said he has a manual
Can't get a trans overtemp warning with a manual trans.


keep it out of overdrive when towing otherwise you just fry the auto trans.
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Unread 09-15-2013, 06:13 AM   #7
Ted15
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Quote:
Originally Posted by tjkj2002

Can't get a trans overtemp warning with a manual trans.

keep it out of overdrive when towing otherwise you just fry the auto trans.
Oh, service manual duh, didn't catch that
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Unread 09-16-2013, 04:20 PM   #8
cablito
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Quote:
Originally Posted by Poncherello View Post
There are couple of other things to do if the issue continues. Keep the tow haul switch on so it stays out of overdrive, you can purchase and install and transmission cooler same as they use on Liberty's that have the tow package and a mechanical fan and clutch assembly also part of the liberty tow package, it help keep things cooler under the hood. When you change your trans fluid make sure you use ATF plus 4.

Good Luck
I am in Brazil, so getting the cooler "tow package" is about the last option I have.

As for the fluid, the shop that will do the job only deals with Chrysler Dodge and Jeeps and I am sure he will use the right one, I recall reading an article by one of the guys that works there talking about the importance of using the right specs.

Now about the tow switch, is it better then to have it on when climbing hard (yet not hard enough to require 4Low)?

Thanks.
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Unread 09-17-2013, 07:41 PM   #9
Ted15
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Quote:
Originally Posted by cablito

I am in Brazil, so getting the cooler "tow package" is about the last option I have.

As for the fluid, the shop that will do the job only deals with Chrysler Dodge and Jeeps and I am sure he will use the right one, I recall reading an article by one of the guys that works there talking about the importance of using the right specs.

Now about the tow switch, is it better then to have it on when climbing hard (yet not hard enough to require 4Low)?

Thanks.
If you have oversize tires, it'll cause problems like that until the gears are changed. I had the same issue but I only had the over temp light once. Towing was a different issue, nothing but problems.
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