2012 GC Overland Summit locks up in 4LO - JeepForum.com
 
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post #1 of 15 Old 09-19-2017, 01:57 PM Thread Starter
Dr. Internet
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2012 GC Overland Summit locks up in 4LO

Our 2012 GC Summit shifted itself into 4LO and won't come out. It is not just an indicator fault; you can feel it in the steering and hear it in the RPM.
Turned it off, disconnected the battery for 10 mins, and started it up. No 4LO! Drove it around the front yard for 5 mins and it did it again.
Reset it again and drove it to the dealer.
He read the codes and one of the early codes was "Low system voltage detected."
Bought Jeep in June of 2012 - suspect it is the battery. Still at dealers. Will let you know what happens.


Steve

2012 Black GC Overland Summit 4x4 2006 Red LJ Rubi
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post #2 of 15 Old 09-19-2017, 03:43 PM
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Quote:
Originally Posted by Dr. Internet View Post
Our 2012 GC Summit shifted itself into 4LO and won't come out. It is not just an indicator fault; you can feel it in the steering and hear it in the RPM.
Turned it off, disconnected the battery for 10 mins, and started it up. No 4LO! Drove it around the front yard for 5 mins and it did it again.
Reset it again and drove it to the dealer.
He read the codes and one of the early codes was "Low system voltage detected."
Bought Jeep in June of 2012 - suspect it is the battery. Still at dealers. Will let you know what happens.
Hi Steve--please keep us posted. If you need any assistance, let us know!

Kori
Jeep Social Care Specialist
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post #3 of 15 Old 09-20-2017, 05:50 AM
scottydog
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My father would replace a car battery after the car wouldn't start and usually after several attempts to recharge. These days I just replace every 4+ years. New cars have a lot of electronics that go crazy with minimal drops in voltage. At $100-150 cost it's not worth the hassle.

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post #4 of 15 Old 09-20-2017, 06:08 AM
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Best battery replacement cost recently, for a better battery is about $200 over the counter. About $175 otherwise. Still a relatively small cost. These AGM types are much more durable than the old soaked style, but I don't think they give much warning of impending doom.

Also note that advanced auto is now not swapping out the WK2 battery for you. They only do batteries in the engine compartment.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #5 of 15 Old 09-20-2017, 06:43 AM
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I've been buying batteries at walmart these days, a 5 year battery for the JGC runs about $140. There are only a handful of battery manufacturers in the USA, so for most a battery is a battery. Unless you are doing severe off road or live in Alaska I would rather replace a little more frequently than spend extra and try to get a couple more years out of it.

My point being the cost and hassle of taking a car to a dealer to end up diagnosing a weak bettery is greater than preemptively just replacing every 4 years.

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post #6 of 15 Old 09-20-2017, 07:35 AM
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Originally Posted by ColdCase View Post
Best battery replacement cost recently, for a better battery is about $200 over the counter. About $175 otherwise. Still a relatively small cost. These AGM types are much more durable than the old soaked style, but I don't think they give much warning of impending doom.

Also note that advanced auto is now not swapping out the WK2 battery for you. They only do batteries in the engine compartment.
End of June had the battery replaced in my WK. 900CCA Exide with 2 years full replacement, 3 more years of pro-rated. $165 installed.

First-time Jeep owner. Please bear with me!

05 WK Limited, 5.7L Hemi, QDII, 2" lift (Sold!)
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post #7 of 15 Old 09-20-2017, 08:31 AM
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Are the WK and WK2 battteries the same AGM type and size? Exide battery outlets are not so convenient to me.

Edit: appears they are both H7, but you don't need the AGM in the WK. AGMs in this size are about $20 more.

Exide website says the FP-AGML4/94R is the only one that fits the WK2 V8, it has 800 CCA but has a 4 year free replacement warranty. OE is rated at 700 CCA I think. Local parts store has that one discontinued, and the replacement is $195.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #8 of 15 Old 09-20-2017, 08:35 AM
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Quote:
Originally Posted by scottydog View Post
I've been buying batteries at walmart these days, a 5 year battery for the JGC runs about $140. There are only a handful of battery manufacturers in the USA, so for most a battery is a battery. Unless you are doing severe off road or live in Alaska I would rather replace a little more frequently than spend extra and try to get a couple more years out of it.

My point being the cost and hassle of taking a car to a dealer to end up diagnosing a weak bettery is greater than preemptively just replacing every 4 years.
Warranties seem to be about the same, but NAPA has a different flavor. The more $ batteries have a bit more CCA and amp capacity and, I hear, use a better quality lead. Seems you get pretty much you pay for Walmart battery is currently $175 in this area but rated for only 760 CCA. Its also shows out of stock, but you may be able to find one in a store anyway. The better battery Advance sells is $195 (850 CCA). Your choice to save $20. Note that the non AGM, soak type, lead acid in the H7 sells for about $20 less.

Bottom line is to be on the lookout for good sales. Prices can vary widely. The better AGM in H7 seem to be rated 850CCA, the average 800CCA, economy 700 and 750. Unless you latch on a special, the price difference is in the $20-40 range..... today

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #9 of 15 Old 09-21-2017, 08:33 AM
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Good writeup Coldcase. I bought a humongo battery for my F150 last spring and it was $100. Guess they charge whatever the market will bear.

Even at $200 the cost per year is maybe $40. I realized that trying to squeeze out a year or two more on a 5 year old battery was not worth the trouble, especially if my wife gets stuck somewhere in a car that won't start.

Battery replacement every 5 years is now part of my routine maintenance.

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post #10 of 15 Old 09-21-2017, 09:25 AM Thread Starter
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Update...

Just got off the phone with the dealer.

They have ordered a new transfer case! I find it hard to believe that the transfer case just failed for no reason, but I have no basis for argument with the dealer.
I asked about the battery and was told, "It is fine." I'll be shopping for a new battery after the transfer case arrives and is installed.
I wonder if the FDCM is located in the transfer case.

Thanks to all for your replies and kind advice. I will let you know if the new tcase resolves the issue.

Steve

2012 Black GC Overland Summit 4x4 2006 Red LJ Rubi
USN Club Hull TJ-13 TX Jeep Club #29
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post #11 of 15 Old 09-23-2017, 10:59 AM
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In batteries. You get what you pay for. Walmart batteries are and inferior product. Even if a battery is produced by the same manufacture. Like jci who makes interstate and walmart. There is a differance
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post #12 of 15 Old 09-23-2017, 04:02 PM Thread Starter
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It's Back!

Hi All,

Picked up the GC today with the new transfer case. Spoke to the mechanic and asked him how he diagnosed the problem. All done with electronics. They ran several diagnostic tests and the result was -- replace transfer case.
In a way, I'm sort of glad that they did it this way. I suspect that the amount of time and talent (i.e. cost) to breakdown the transfer case and replace the broken widget is much greater than the cost of the swap. The USAF pioneered this method (black box replacement) back in the day as a more cost effective means of keeping SAC aircraft flying.
The best news is that it cost me $100. Thanks to all for recommending the extended warranty four year ago!

Going battery shopping next week.

Steve

2012 Black GC Overland Summit 4x4 2006 Red LJ Rubi
USN Club Hull TJ-13 TX Jeep Club #29
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post #13 of 15 Old 09-23-2017, 06:33 PM
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Thanks for the update.... I'm familiar with SAC, more underground than airborne, however.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #14 of 15 Old 09-24-2017, 09:50 AM Thread Starter
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I was in the Navy and my brother was in the Air Force. I used to kid him about repairs.
In the AF, you pull the defective box and send it to the "next higher repair facility". We didn't have those at sea. I was the repair facility (electronics), so we had to learn and perform component level repair.

Steve

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post #15 of 15 Old 09-25-2017, 09:28 AM
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Quote:
Originally Posted by Dr. Internet View Post
I was in the Navy and my brother was in the Air Force. I used to kid him about repairs.
In the AF, you pull the defective box and send it to the "next higher repair facility". We didn't have those at sea. I was the repair facility (electronics), so we had to learn and perform component level repair.
Agreed!

-AT3 USN
-IT2 USNR

EDIT: It was probably the motor. This is not terribly uncommon on the WKs at least.

First-time Jeep owner. Please bear with me!

05 WK Limited, 5.7L Hemi, QDII, 2" lift (Sold!)
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