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Unread 07-16-2011, 10:59 PM   #1
davidsonlaw
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"Hot Oil" Warning Message?

I was out wheeling today and while I was working my way up one side of the mountain, my jeep (2008 JKU Rubicon) started beeping at me and the dashboard threw up a message that said "HOT OIL." I thought this was odd, so I found a good place to stop and looked under the hood and crawled under and felt around the pan, nothing seemed any hotter than they would otherwise. It was 80 degrees out so it wasn't blazing hot. After waiting 15 minutes, I crawled back into my jeep, started her up, went over the top of the mountain, down the other side and drove home with no problem.

The engine coolant temperature gauge stayed pegged right where it should be. It was a little cooler when I restarted, but climbed right back to pointing straight up and stayed there. I got my shop manual out and my owner's manual out this afternoon and couldn't find anything about the "HOT OIL" warning, and nothing showed up when I searched the JK tech forum for "hot oil," either. Also, no other lights or warnings popped up on the dash. Does anybody know what this means?

Thanks!

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Unread 07-16-2011, 11:10 PM   #2
OregonVette
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Hot oil treatment. Makes your hair unnaturally silky smooth. Maybe your Jeep is trying to tell you something.
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Unread 07-16-2011, 11:39 PM   #3
McKBrew
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It's a warning built into the Jeep when your transmission oil temperature gets above a certain threshold. The JK's originally had this feature disabled or set at a higher threshold but due to recalls, etc... the alarm is more frequent.

The big issue here is the potential for your entire Jeep to catch on fire due to transmission fluid overheating and spilling out. Not joking as it has happened. For that specific reason many of us install an aftermarket transmission cooler. They cost about 60 bucks. Search for BM 70268.
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Unread 07-17-2011, 02:35 AM   #4
1222
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If you have a long climb up a hill/mountain in the dirt it’s best to put it in 2nd or even 1st if needed to keep the tranny from shifting back and forth between gears. When it does the oil heats up real quick as you found out already. Like mentioned, addition of an auxiliary cooler is something would help keep it cooler.
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Unread 07-17-2011, 07:02 AM   #5
Scooter_Trash
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It's Chrysler's cheap *** recall fix for a very real problem. Instead of installing transmission coolers on all the autos, they programmed the computer to give you a "hot oil" warning.

Why fix the problem when you can put the liability into the owners lap?

Luckily I have the tow package with mine and the cooler seems to do a good enough job, although I think some have had issues with it.
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Unread 07-17-2011, 09:33 AM   #6
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Quote:
Originally Posted by Scooter_Trash View Post
It's Chrysler's cheap *** recall fix for a very real problem. Instead of installing transmission coolers on all the autos, they programmed the computer to give you a "hot oil" warning.

Why fix the problem when you can put the liability into the owners lap?

Luckily I have the tow package with mine and the cooler seems to do a good enough job, although I think some have had issues with it.
The tow package adds nothing to the automatic transmission cooling system, if that's what you are thinking.
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Unread 07-17-2011, 10:02 AM   #7
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Quote:
Originally Posted by ronjenx View Post
The tow package adds nothing to the automatic transmission cooling system, if that's what you are thinking.
You are correct. Aftermarket tranny cooler is the way to go.
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Unread 07-17-2011, 05:43 PM   #8
Millermagic
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On top of the possibility of catching on fire, you're severely limiting the life of the already weak auto transmission.

Flush the fluid NOW and get as big of a cooler as you can on it. Especially since you're crawling along.
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Unread 07-17-2011, 06:51 PM   #9
deerassassin22
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If anyone is interested check this out

http://bmracing.com/PRODUCTS/Cast-Al...minum_Deep_Pan

I have already installed the cooler and will be calling tommorow to find out the dimensions of this pan to see if it will fit with my Rock Hard Tranny skid. If it does this is going in as well 4 more quarts of fluid and my heavy duty cooler should be nice and Anyone know what model transmission an Automatic 2011 JK 4door is?
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Unread 07-17-2011, 07:04 PM   #10
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Quote:
Originally Posted by deerassassin22 View Post
if anyone is interested check this out

http://bmracing.com/products/cast-aluminum-deep-pans/10280_cast_aluminum_deep_pan

i have already installed the cooler and will be calling tommorow to find out the dimensions of this pan to see if it will fit with my rock hard tranny skid. If it does this is going in as well 4 more quarts of fluid and my heavy duty cooler should be nice and Anyone know what model transmission an automatic 2011 jk 4door is?
42rle
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Unread 07-17-2011, 07:10 PM   #11
deerassassin22
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^^^^Thanks Appreciate that
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Unread 07-17-2011, 08:07 PM   #12
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davidsonlaw - when you're wheeling always turn O/D off. Your transmission will lock up in 3rd and stay a lot cooler. If you are going to be running slow then keep it in 4 Low. If you get HOT OIL then pull over, put it in Neutral, and keep the engine running to push the oil through the stock cooler to help cool things down faster.

An extra oil cooler is certainly cheap, and does keep the transmission cooler, but could potentially be a problem with warranty work - especially if you have the lifetime powertrain warranty. I got mixed signals from my dealer - they were OK with my lift, tires, gears, etc., but iffy on the cooler.

Out here wheeling in the desert I haven’t gotten a HOT OIL indicator yet, but if I did I would do as Millermagic suggested and take it to the dealer and have them flush out the old oil and ask them if they have a real cure for the problem. Maybe they’ll install a free oil cooler and not mess with your warrantee.
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Unread 07-17-2011, 08:13 PM   #13
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Quote:
Originally Posted by joe002 View Post
An extra oil cooler is certainly cheap, and does keep the transmission cooler, but could potentially be a problem with warranty work - especially if you have the lifetime powertrain warranty. I got mixed signals from my dealer - they were OK with my lift, tires, gears, etc., but iffy on the cooler.
That's weird. Seems I remember the recall saying they will reimburse you if you have previously taken measure to correct the problem. Lot's of folks got reimbursed for the tranny coolers they installed.
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Unread 07-17-2011, 08:25 PM   #14
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Quote:
Originally Posted by Scooter_Trash View Post
That's weird. Seems I remember the recall saying they will reimburse you if you have previously taken measure to correct the problem. Lot's of folks got reimbursed for the tranny coolers they installed.
Yeah, that's why I suggested bringing it to the dealer when you get the problem. I'm thinking that since I hadn’t seen the problem they were questioning it, but if you see the problem then that would be their solution.

Over the years I've had many vehicles, and all of the ones with an automatic transmission died before 200k miles, I assume the Jeep transmission will also fail, and I don't want to give the dealer any reason to deny fixing it - not that they won't deny it anyway, but I would hate to have them deny it because I made things better by installing an extra transmission cooler.
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Unread 07-17-2011, 08:26 PM   #15
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I've had my (JKUR), aux cooling system in the Northern Nevada Desert for over two years and the tranny fluid has never gotten any hotter that 200° F-and thats in 115° F heat--

Does the same in the Sierras climbing rocky hills !!

I'm more concerned about my tranny burning up, 40 miles from a paved hiwy, than a warranty, so I'll stick with the aux cooling !!

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