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  #13  
Old 02-14-2014, 02:01 PM
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Re: EVIC message - 4WD not available transmission overheated

Here is what is noted on $0 service invoice.

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.
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Old 02-14-2014, 02:33 PM
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Quote:
Originally Posted by grandriver125 View Post
Here is what is noted on $0 service invoice.

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.
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Old 02-14-2014, 04:06 PM
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Re: EVIC message - 4WD not available transmission overheated

C1477-4B-TRANSFER CASE CLUTCH - OVER TEMPERATURE
  • When Monitored: Ignition on.
  • 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)
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Old 02-14-2014, 07:47 PM
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Re: EVIC message - 4WD not available transmission overheated

Quote:
Originally Posted by fnkychkn View Post
C1477-4B-TRANSFER CASE CLUTCH - OVER TEMPERATURE
  • When Monitored: Ignition on.
  • 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.

GR
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Old 02-14-2014, 08:34 PM
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Quote:
Originally Posted by grandriver125 View Post

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.

GR
Is your ambient temp display relatively accurate?
If temp display is accurate, I'm thinking a software update will most likely fix it.
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Old 02-14-2014, 08:37 PM
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Re: EVIC message - 4WD not available transmission overheated

Quote:
Originally Posted by fnkychkn View Post
Is your ambient temp display relatively accurate?
Yes. very close. Ties in to Weather Channel within a degree or two.

Further, it sure hasn't been that warm in Florida the past month. I don't think ambient has been as high as 80 when this warning popped up.
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Old 02-14-2014, 09:25 PM
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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.
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Old 04-26-2014, 01:40 PM
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Re: EVIC message - 4WD not available transmission overheated

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.
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Old 04-26-2014, 02:11 PM
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Re: EVIC message - 4WD not available transmission overheated

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.

GR
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Old 04-30-2014, 03:49 PM
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Re: EVIC message - 4WD not available transmission overheated

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.
---------------------------------------

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.

GR
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Old 05-01-2014, 12:58 AM
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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.
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  #24  
Old 05-01-2014, 06:53 AM
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Re: EVIC message - 4WD not available transmission overheated

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Originally Posted by Array View Post
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.
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