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  #25  
Old 07-17-2014, 12:24 AM
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Today I drove it a bit and stopped engine compartment was maybe 10-20% hot as compared to yesterday.

What is making so much heat under the hood? This heat is coming from the center front upper side. As if something is blowing it in. Could it be the cheap water pump?

Dying battery? Belt and tensioner dying?

Cmon guys how can I get more cold air under the hood?
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  #26  
Old 07-18-2014, 10:44 AM
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Re: Transmission Over Temp Message 4.7 WK

The heat in the engine compartment comes from the cooling airflow which goes trough the radiator and from the engine itself, especially the head and exhaust headers. It is normal to be that hot in there.
If the problem was your waterpump, your engine coolant temperature would go over the limit, which at least you didnīt mention to be happening.
One thing you mentioned before was that the engine noise seems to be louder. Did you check for any exhaust leak from the headers? Maybe broken header mounting bolt(s)? No exhaust leak pointing towards one of the transmission cooler lines?
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  #27  
Old 07-18-2014, 10:50 AM
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Re: Transmission Over Temp Message 4.7 WK

Thx nice explanation. Coolant seems stable, though I should check somehow to see if the water coolant mixture is correct. Yesterday I drove same distance as last time and it was nowhere as hot as last time when u got the message and opened the hood. Around 50+% hotter last time. Maybe this is why people get this message at any given moment and especially on hotter days?

Something must be up in there, where would you first check? Perhaps it's the 3.5 yr old battery thar is going...and is causing electrical bugs
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  #28  
Old 08-01-2014, 08:45 PM
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Re: Transmission Over Temp Message 4.7 WK

I think I've might of gotten more clues after reading this page OVERHEATING Jeep concerning the transmission over temp message.

A few questions:

1) I'd like to change the transmission cooler inside the radiator, is that possible, what would the part be called?
2) Where is the fan? What is the part called? The Radiator fan?

I am trying to do the following:

I will put a new B&M tranny cooler in front of my condenser on the passenger side of the radiator since this side has shit loads of air flow provided by the mechanical fan. (by the way, there is NO ELECTRIC FAN THAT CAN MATCH THE CFM AIRFLOW OF THE MECHANICAL FAN ON A XJ) If you are having an overheating problem like me, spend it on a quality tranny cooler and bypass the radiator instead of a $400 triple electric fan setup.
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  #29  
Old 08-02-2014, 12:13 PM
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Re: Transmission Over Temp Message 4.7 WK

Quote:
Originally Posted by Laredo2006 View Post
I think I've might of gotten more clues after reading this page OVERHEATING Jeep concerning the transmission over temp message.

A few questions:

1) I'd like to change the transmission cooler inside the radiator, is that possible, what would the part be called?
2) Where is the fan? What is the part called? The Radiator fan?

I am trying to do the following:

I will put a new B&M tranny cooler in front of my condenser on the passenger side of the radiator since this side has shit loads of air flow provided by the mechanical fan. (by the way, there is NO ELECTRIC FAN THAT CAN MATCH THE CFM AIRFLOW OF THE MECHANICAL FAN ON A XJ) If you are having an overheating problem like me, spend it on a quality tranny cooler and bypass the radiator instead of a $400 triple electric fan setup.
I am curious why all the extra add-ons are going to fix the problem? The transmission runs at the proper temperature when its healthy. Add-on coolers are for applications where extra load is present such as towing or huge tires. Heat in a transmission is created by friction. If yours is overheating, something is slipping. Are you positive your torque converter is going into lockup reliably. If not, it WILL overheat with continuous use (highway driving). You need to fix the root of the problem instead of treat the symptoms!
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  #30  
Old 08-02-2014, 12:36 PM
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Re: Transmission Over Temp Message 4.7 WK

So I should tell them to check if my torque converter is going into locup reliably?
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  #31  
Old 08-02-2014, 04:40 PM
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Re: Transmission Over Temp Message 4.7 WK

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Originally Posted by Laredo2006 View Post
So I should tell them to check if my torque converter is going into locup reliably?
Absolutely! Admittedly, I am unfamiliar with your transmission but if its like most modern ones, it has a lockup torque converter. It slips (by design) at idle, under acceleration, and during gear changes. It should lock up with no slip above a certain speed. If it does not, the slippage generates heat which builds up temperature in the trans fluid and causes overheating. This is most often seen at highway speeds over several miles.

I had a 700R4 transmission overheat because the break pedal switch, which when enabled unlocks the torque converter, failed. It could be something simple like that. If your transmission is overeheating under normal loads, an extra cooler isn't the solution. If your existing cooler in the radiator is bad, that should be fixed. A new radiator is the practical way...I doubt it can be changed out since its inside the radiator.
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  #32  
Old 08-02-2014, 10:44 PM
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Re: Transmission Over Temp Message 4.7 WK

If your torque converter would not lock up when its suppost to do, you will get a check engine light and related fault code. The PCM does monitor the engine speed and the transmission input speed and if there is a difference between the two when the torque converter should be locked, the fault will be set.
Did you check the transmission fluid temperature with an infrared thermometer (just point it to the transmission oil pan for a good temperature reading)? It can easily be a faulty indication. I heard from others where after changing the PCM the problem was solved.
Also have your battery checked. The WK (as most of the modern electronic cars) is quite sensitive regarding the battery voltage (and charging system voltage)
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  #33  
Old 08-03-2014, 10:26 AM
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Re: Transmission Over Temp Message 4.7 WK

Hey thanks for all the info,

this is the part in the engine that is boiling hot when I open the hood and investigate. Someone here also said: "Hello and welcome to JustAnswer, My name is XXXXX XXXXX I will be assisting you... If your trans temp light is on and your trans isnt overheating, then you need to replace the Trans Temp sensor... In order to do this you will need to remove the valvebody, and it is a part of the TRS...You will be looking at 300-400 with parts and labor... The way to test the Trans temp is with a scantool while montoring the Trans temp sensor.. But with your vehicle having the code, the sensor may be incorrect, with that I would use a IR Temp gun to see what Temp pan is.. The Trans temp and Engine Coolant temp should be about the same....If you trans isnt overheating, I suggest running the test Im supplying you.. If it is actually running hot, I suggest flushing your cooler, if the cooler flow rate is low, you have a bad Trans cooler theromostat or stopped up cooler". http://www.justanswer.com/transmissions/69ze9-causes-transmission-overtemp-light-on.html




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  #34  
Old 08-03-2014, 10:59 AM
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Re: Transmission Over Temp Message 4.7 WK

The hose in the picture is the upper radiator hose. Coolant flows from the engine to the radiator through this hose as soon as the thermostat opens. So after driving for a while this hose is as hot as the coolant. As long as your coolant temperature is ok, the temperature of the hose will be as well.
The temperature resistor is indeed part of the TRS solenoid block. This part cost around USD 260 when im not wrong. Here they sell the OEM part: Automotive Transmission Electronics Specialists.
Bought mine there as well. But first you will need to know what the real temperature is, and go from there.
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  #35  
Old 08-03-2014, 11:07 AM
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Re: Transmission Over Temp Message 4.7 WK

Hey Frango thx a lot. I had a bunch of things I wrote down from the forums checked out by the dealer. The trans fluid, cooler lines, coolant temp, all seemed normal to them. From starter connections to batteries all are fine according to the dealer. I have the reports if there's anything you want me to post here, please let me know. This is one fkin annoying bug of a problem (the transmission over temp message) that many have chosen just to ignore, unless they are having other problems. Now how to tell if I should just ignore it? Next time it happens, should I pull over and check for something? Damn it, im going on a 500 mile road trip and I hope this doesn't affect me...

What would you do? The dealer proposed to change the transmission valve solenoid stuff for 1300$...and they dont guarentee that is the issue. Arghhhhh
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Old 08-03-2014, 11:33 AM
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Re: Transmission Over Temp Message 4.7 WK

Next step is to use an Infrared Temperature meter (gun) and verify that the transmission temperature agrees with the sensor reading. An ODB2 scanner can be used to read the value of the sensor for the ECU. If the two don't agree within a few degrees, you have a bad sensor. If they agree and the tranny is in fact too hot, you may have a faulty cooling system....thermostat, radiator, transmission cooler, etc.

You need to do this before you cook something and it cost you big $$$.
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