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Unread 08-31-2010, 07:24 PM   #1
jeepntony
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2007 WK 
 
Join Date: Oct 2008
Location: Flint Hills
Posts: 16
Starting Problems...HELP

I have a 07 grand cherokee laredo 4x4 with the 3.7 L 6 cyl. I tried to start my jeep this morning and it wouldn't turn over. Not even a click. All the lights come on and the radio works fine. The battery has a full charge and everything is fine. But it won't start. It says that the transmission is overheated. Iv had this problem before and they replaced the Wireless Ignition Node WIN module...it took care of the problem for one month. It cost me 350bucks the first time around. If anyone knws wat the problem is please tell me. I can't figure this problem out...HELP!

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Unread 09-01-2010, 09:05 AM   #2
brutusjeep
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2006 WK 
 
Join Date: May 2009
Location: Colorado
Posts: 376
Could be the starter. Though the 3.7's don't have many issues with this. But, sounds like a starter to me.
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Unread 09-01-2010, 12:19 PM   #3
jeepntony
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2007 WK 
 
Join Date: Oct 2008
Location: Flint Hills
Posts: 16
Yeah I think I fugureed it out. A lot of mechanics said that corssion buildup on the positive side of the starter. And also check the wires from the starter to the control box. There may be corrosion on those too. Thanks for ur help. Ill pull the starter out and clean the wires and regrease everything....thanks again.
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Unread 09-04-2010, 02:29 PM   #4
tju57
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Join Date: Jul 2010
Location: rockford,il
Posts: 5
I have the same problem

My 2007 4.7 v8 has the same problem. The first thought was the neutral safety switch, but when I called the dealer to get a new switch he said it's not a servicable item. After many questions and about 15 minutes later, the neutral safety switch is incorporated in the transmission solenoid pack, about $350.00.
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Unread 09-06-2010, 03:12 PM   #5
Macguba798
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2005 WK 
 
Join Date: Oct 2006
Location: Virginia
Posts: 43
Is it throwing a code? When you said, "It says that the transmission is overheated" I'm guessing that's from the code. If so, I would check for trans oil level first and make sure no leaks underneath and lastly tju57 may have a point here.

Good luck with the fix.
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Unread 09-06-2010, 09:20 PM   #6
jeepntony
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2007 WK 
 
Join Date: Oct 2008
Location: Flint Hills
Posts: 16
Thanks for your input everyone...I really appreciate it. This past weekend I took apart the starter and cleaned all the connections on the battery, starter, ground to the engine block,ect. With terminal cleaner and wirebrushed everything, then swabbed everything with electrical grease. It feels like it starts better than it ever has. When I took the positive and negative connections aart from the starter...they were really loos! So ir was probably a connection problem. Knock on wood!!! But I still don't understand the whole "transmission overheat" warning on my dash. There were no leaks underneath and I still have to take it to a dealer in order to get the fluid checked. There Is No Dipstick...WEIRD! If anyone knows if u can install one on an 07 3.7 V6 , please tell me. Again thanks for everyones input.
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Unread 09-07-2010, 01:55 PM   #7
mdsbigpapa
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Join Date: Jan 2008
Location: Lima, NY
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Quote:
Originally Posted by jeepntony View Post
Thanks for your input everyone...I really appreciate it. This past weekend I took apart the starter and cleaned all the connections on the battery, starter, ground to the engine block,ect. With terminal cleaner and wirebrushed everything, then swabbed everything with electrical grease. It feels like it starts better than it ever has. When I took the positive and negative connections aart from the starter...they were really loos! So ir was probably a connection problem. Knock on wood!!! But I still don't understand the whole "transmission overheat" warning on my dash. There were no leaks underneath and I still have to take it to a dealer in order to get the fluid checked. There Is No Dipstick...WEIRD! If anyone knows if u can install one on an 07 3.7 V6 , please tell me. Again thanks for everyones input.
OK, here's my best guess as to why the "Transmission Overheat" message was displayed. Whenever I tune my Jeep with the Flashpaq, I get the same message along with a couple of others that escape me right now. The tuner requires the BUS to be interrupted so it can perform its magic. I believe it is very similar to a power loss to the PCM. Given this, and your dirty terminal/loose connections, there may have been a slight power interruption to the PCM which caused the "Transmission Overheat" message.
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Unread 09-07-2010, 03:03 PM   #8
jeepntony
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2007 WK 
 
Join Date: Oct 2008
Location: Flint Hills
Posts: 16
Oh ok...that would explain this whole mess. Because when it was starting whenever I yanked on the negaitive cable. The message would still show up. But after I cleaned, brushed, greased, and retightened everything the message has gone away. Thanks
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Unread 09-07-2010, 03:42 PM   #9
stanton3
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2007 WK 
 
Join Date: Mar 2010
Location: Macon, Ga
Posts: 498
Mine did the exact same thing, had to get a new starter. Still says transmission over temp a few months after, but has been fine ever since. Never threw a code either.
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