Today we got this message twice. Transmission temperature was only 158 def F. When stopped shortly after the first message, I tried to move the mode selection through snow, mud, etc and it again said no can do as transmission too hot.
Hard to believe. Anyone else have the problem or anyone from Jeep on the forum aware of it.
Not sure what to do at this point. I'm over a 1000 miles from home.
It happened again today - ambient temp was 72 and transmission temp was 158.
I'm going to call my dealer's service manager and see if he can check with Jeep to determine if this is a software problem or a real transmission problem.
Go to/call the nearest dealer and tell them you are on a trip. If they are any good they will get you right in and find out what is wrong. That is what we always did in that situation. Your warranty is good at any dealer not just the purchasing one. Could be nothing or could be something serious. Best to find out ASAP so you don't wind up with a blown trans that far from home when it could have been avoided.
Talked to Service Manager back home. From what he could find this warning comes on when the transmission fluid temperature increases 10 deg in one second. It appears there is no temperature sensor on the transfer case so it is referring to the transmission.
The Cherokee won't move until tomorrow and then it will be an 18 mile trip - most on I-75 and return. If the message appears again it goes into the dealer sooner than I planned for a code read and hopefully diagnosis.
10 deg in one second is not a small change based on my experience with a ScanGauge and the transmission fluid in several motorhomes - as well as our former Escape that was towed behind our motorhome. We will not be heading back north until the end of Feb.
Called Jeep US and they agreed it should go into the dealer in Bradenton for a code read to see if they can determine the problem. It goes in Friday morning. They wanted it in early in case whatever they have to do takes the whole day (hard to imagine).
Today the warning flashed again and when I reached a traffic light I was able to put it into 4WD Snow (but set it back to auto and didn't drive in the snow in FLA . Then a few miles later it flashed the notice again and at the next light it would not go into 4WD. This continued off and on all the way home.
Took it into the dealer in Bradenton. The only thing they could find was an old code indicating the clutch in the transfer case overheated. They could not find anything else so there was nothing they could do as they could not replicate the issue.
If I'm out during the hours they are open and the message is displayed they agreed I could drive right to their service dept and then they can see it live (if it lasts that long - which has not been the case).
Just hope we don't have problems on the way back home in a couple of weeks. Will return with the T&C since "she who must be obeyed" needs a lot of room for the "stuff" she brings to Florida.
C/S when in 4WD auto shows unavailable at times and transmission over temp on display.
Scanned system to find stored DTC C1477-4B transfer case clutch over temp intermittent. Checked temp sensors, found OK. Cleared codes and road test. Condition to set code not present. Checked for updates or TSB's. Non found.
Unable to duplicate concern at this time.
I assume someone here has a list of the codes and what they signify.
The vehicle is so new it is doubtful anyone would have the codes.
It is weird they call it transfer case unless they call the whole system the transfer case. The ptu only has gears and an actuator so they must be talking about the rear axle clutch.
Set Condition: The Drive Train Control Module (DTCM) detects an overheat condition due to excessive usage of components from hard driving conditions (Mud, Sand, Snow, 2WD Chassis dynamometer etc.) or ambient temperatures.
Possible Causes
DRIVING CONDITIONS
AMBIENT TEMPERATURE SENSOR
ELECTRONICALLY CONTROLLED CLUTCH (ECC)
DRIVE TRAIN CONTROL MODULE (DTCM)
Thanks. Clearly something is haywire since 70 mph in 8th gear and auto mode is not exactly hard driving. It has also occurred at lower speeds. I now wonder what it is going to take to get it corrected.
I had a similar issue with a customer's jeep. He couldn't wait and said he'd come back of it ever happened again. Haven't heard from him on over month.
Btw, it was -5*F when it happened.
I would be interested in what eventually happened with your vehicle.
I recently took ownership of a V6 Cherokee Limited with a tow package. It has just under 300 miles on the odometer. Most of the driving has been on country roads at break-in speeds with one brief highway trip of about 30 miles at about 60 mph. More or less what the manual advises.
Recently I started to get an EVIC warning "4WD Overheated Temporarily Unavailable" on an intermittent basis. Then a couple of days ago the warning went on full time unless I was in "sport" mode on the Select Terrain dial. These warnings occurred at various reasonable speeds on rural roads, not on a highway, and occurred almost immediately after starting the vehicle after a period of non-use (ie overnight) It has been returned to the dealer for evaluation.
Any idea whether this is a mechanical or electronic issue? Bit of a let down to say the least.
I had mine in for an oil change and filter this week. It has been sitting in the garage since early March as we took our T&C back to Florida because of the "stuff" dear wife packs (well, and my golf clubs).
I mentioned to service reception person that the dealer in Florida checked it out and could find nothing.
Apparently the mechanic removed the drive line and checked a few other things (took a long time). They found some abnormal wear on the transmission and something else that I didn't understand. They are now "consulting" with the factory to determine the next step. We have not had it occur since we returned two weeks ago and started using it again but the weather has been far from warm (cross the river from Detroit).
As soon as I hear something from the dealer I'll report to this group.
Got completed work order in the mail from dealer today.
It states:
6465 Internal Fault Road Tested. Unable to duplicate. Found C1477-4B - T-case clutch over temp - stored. No updates. No TSBS. Tested 4WD on hoist. OK. Inspected fluid. Low and has metallic paste stuck to magnet. Suspect internal fault. Contacted tech line. Submitted scan report. Waiting for feedback.
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Any comments from others appreciated. We are starting to plan a trip out to the Four Corners this fall and this problem had better be resolved since having a transmission pack it in during a vacation will not be nice.
Interesting. Wonder how they checked the transmission fluid. I'm not saying they didn't. It's just that I've heard the transmission is a sealed unit. Did they drop a pan - and how would the fluid be put back in? Just curious.
I think I misread. Fluid check was probably T-Case.
I believe they have a port on the transmission that allows them with a special tool to check it/add fluid. That is the "plug".
Low fluid is an issue. The question is how low. That could be the heat problem, easily.
Metallic particles depending on how many can be normal. Obviously pasted up flakes is not normal. That might be an indication that the fluid overheated. That is why the the "plug" refered to above is magnetized.
I still think not putting a dip stick on this Transmission was a big mistake.
A normal "car" yes. A 4x4/ off road/towing vehicle needs someway to monitor the fluid. This is especially true towing or heavy off road.
You need to be able to keep an eye out for the first signs of burning/degradation of the fluid.
Just a thought.
The problem I have with this is it isn't specific enough. There is no clutch in the ptu (transfer case) so I am assuming the code refers to the rear drive module. There is a clutch in this but it is a seperate system from the rest of the unit. The fill plug the tech checked is for the gearset. If the tech didn't notice any leaking fluid I would guess it wasnt actually low, because theu don't get filled to the bottom of the fill plug like most axles. The metallic film is worrying though, but there is no temp sensor in the gearset cavity, only for the clutch.
So after 5 days of trying to replicate my complaint regarding the EVIC warning "4WD Unavailable Transmission Overheated" that came up on an intermittent/regular basis except in "sport" mode, the dealer finally "got a code". Their techs actually drove the car home for a few days. (not thrilled about that). They were still boggled and called Chrysler Engineering. Chrysler is now sending a replacement rear differential unit for my vehicle. We will see how long that takes and also whether it actually solves the problem. I will post the results as stated on the final invoice when I receive it. I have owned the car for 3 weeks now. The dealer has had it for the last week. During the first 2 weeks, we drove it with trepidation due to the warnings. Not a positive experience for a new vehicle owner. (2014 Cherokee Limited Granite Crystal, V6, Tow, Pano, 9 speaker with sub etc. 496 km or 306 miles on the vehicle) Wonder what I could get if I traded it in
IanMac, we got consistent answers. I sent the service manager and note today and got the following reply:
We are awaiting a rear differential unit for your vehicle.
I talked with engineering personally and I will check on availability on Friday.
Code pertains to rear drive unit, not transmission so not that involved as far as replacement.
Now we have two of us who will be monitoring the situation after it is changed. I hope that resolves the matter. We are going to drive out to the Four Corners and Nevada this fall and I'd hate to be sitting in a hotel waiting for a fix.
I wonder if we'll see the cost of this replacement?
In 2009 GM had replace the PIG in my 2007 Kodiak based motorhome and the cost was $3300. Not quite the same size but I'd imagine the entire rear differential isn't cheap.
I wonder if we'll see the cost of this replacement?
In 2009 GM had replace the PIG in my 2007 Kodiak based motorhome and the cost was $3300. Not quite the same size but I'd imagine the entire rear differential isn't cheap.
Might I ask how long it took to do the replacement? I'm kind of visualizing disconnection of the drive shaft, axles on both sides, pull out the RDM put in a new one. Am I even close?