I have a 2020 GCTH as well with similar miles. I've not tried to put into 4LO, but now I'm tempted to just to see what happens.

 

Let me know if you do and what happens.

 

I have a 19 GC Trailhawk. This light does not come on when I put my vehicle in 4LO, mud mode, etc. However, don't drive on hard pavement for any period of time in these modes, and if you do, don'g make any sharp turns. This will bind up the driveline, which is not good for it.

Keith

 

That is not normal. Take it quickly to a Jeep dealership and have it checked out.
Hopefully your warranty is still in effect.

One other thing, 'use it or lose it'!
I engage 4x4 low every once in a while whether i need it or not to exercise the parts involved and possibly getting lube to those working 4x4 low parts in the Tcase.

 

That is not normal. Take it quickly to a Jeep dealership and have it checked out.
Hopefully your warranty is still in effect.

One other thing, 'use it or lose it'!
I engage 4x4 low every once in a while whether i need it or not to exercise the parts involved and possibly getting lube to those working 4x4 low parts in the Tcase.

It's still under warenty as the vehicle is brand new, only had it for a month and only 621 miles on it.

 

NOTE:
• If shift conditions/interlocks are not met, or a transfer
case motor temperature protection condition exists, a
“For 4x4 High Slow Below 3 MPH or 5 KPH Put Trans
in N Press 4 Low” message will flash from the
Electronic Vehicle Information Center (EVIC). Refer to
“Electronic Vehicle Information Center (EVIC)” in
“Understanding Your Instrument Panel” for further
information.
• Shifting into or out of 4WD LOW is possible with the
vehicle completely stopped; however, difficulty may
occur due to the mating clutch teeth not being properly
aligned. Several attempts may be required for
clutch teeth alignment and shift completion to occur.
The preferred method is with the vehicle rolling 0 to
3 mph (0 to 5 km/h). If the vehicle is moving faster
than 3 mph (5 km/h), the transfer case will not allow
the shift.

I was looking for the warnings about using 4 Low on high traction surfaces, like roads. But I can't find them.
I'm pretty sure shifting into 4 Low locks the clutch pak in the transfer case to be Part Time 4WD. But I suspect, the vehicle electronics might detect you turning and loosen the clutch pak, thus it can be turned on high traction surfaces, like the road. Personally I wouldn't risk it, but on dirt and grass when I was in 4 Low one time, I did a tight 3 point turn once, and did not notice any tire slip while doing it, which supports it loosens up the XFR case clutch pak when turning.

If you didn't get the shift to 4 Low right, you should have gotten a message in the EVIC with the instructions on how to do it right.
If the motor overheated or you were at a full stop and the dog clutch teeth did not align, I could see you get a Service 4WD light. I'd try it again, make sure you're rolling 2mph when you try it next time and see if it comes back. You can shift into 4 Low on a high traction surface, a road, as long as you drive straight the entire time, shift back to 4 high before turning.

 

 

What year owner manual is that taken from? I have checked again, I can not find the warning in my 2011 version.

 

Mine's 2014. Below from the 2011 manual......... from what's stated 4wdLow is only to be used off pavement but it could have been more clearly called out such as they did in the 2014 manual.

 

I am going to have it checked out when I take it in for my first oil change which will be in December. I don't imagine that I will be using the 4WD very often I probably won't be in any situations where I would really need it. But I still want to make sure that it is working properly in case. I was on a dirt tail when I tested it and was at low speeds. Honestly I really didn't need it as the trail wasn't that bad but wanted to test it out. what I did realize is that you have to be going really slow to shift in or out, basically under 3 miles per hour.

 

Unless things have changed drastically, you should be stopped when engaging 4 low. On my Ram 1500, for example, you can't put it in low unless you are stopped and in neutral. Same for my old Isuzu Trooper II.
Definitely take it to the dealer, though.

 

Unless things have changed drastically, you should be stopped when engaging 4 low. On my Ram 1500, for example, you can't put it in low unless you are stopped and in neutral. Same for my old Isuzu Trooper II.
Definitely take it to the dealer, though.

This is what it states in the owners manual:

SHIFTING PROCEDURES
4WD HI To 4WD LOW
With the vehicle at speeds of 0 to 3 mph
(0 to 5 km/h), the ignition switch in the ON
position or the engine running, shift the
transmission into “N”, and push the “4WD
LOW” button once on the transfer case switch.
The “4WD LOW” indicator light in the instrument
cluster will begin to flash and remain on solid
when the shift is complete.
Transfer Case Switch
NOTE:
If shift conditions/interlocks are not met, or a
transfer case motor temperature protection
condition exists, a “For 4x4 Low Slow Below
3 mph (5 km/h) Put Trans in “N” Press 4 Low”
message will flash from the instrument cluster
display. Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for
further information.

Apprently you can also shift into 4WD when stopped but it may not catch and you may have to try a few times.

 

....I suggest you take it in to a Jeep dealer where they’ll find out what’s up if/before any further damage. I have a 2019 Jeep Grand Cherokee Trailhawk V6 and have had 4x4’s throughout my years. Just back from off roading in Utah and my Jeep worked flawlessly. Just a suggestion but whether or not you go off roading you should find some sand, mud or loose dirt every now and then and “exercise” your 4x4. This will keep the seals lubricated and gears working fine. You don’t need much just enough to get the fluids circulating and gears meshing. Also read your manual and/or watch YouTube videos on proper ways to engage 4x4 in your Jeep especially 4 wheel low. Who knows... maybe light came on because of improper engagement. Enjoy your Jeep it is great..... I tow my RV trailer with mine and then unhook and explore where you cannot with other vehicles... Try that and you’ll really appreciate your Jeep GC all the more.

 

The WK2 is by default in Automatic 4WD mode, so just driving it you're exercising the 4WD components, even the motor since it varies the pressure on the clutch pack in auto mode.
Yes, I agree, you should shift into 4WD LOW for a few moments to exercise the motor and linkage that does that, you can do it on dry pavement as long as you don't turn. I engage it and drive 10 feet straight and then disengage it.

 

Mine had a similar issue, throwing codes after I engaged 4w low for the first time, with under 200 miles. The dealer cleared the codes, told me it is not uncommon when the battery goes low between the factory and dealership. I use it frequently and have not had a problem since.

 

My '19 did the same thing the first time I switched into low range (the day after I brought it home) but after shifting out of low, turning the engine off, then starting up and shifting back into low it didn't do it and never did it again. I took it to the dealer a couple of days later and they found no problem. I've had it in low numerous times since then and it seems to work fine.

 

Good to know, I think I need to test mine out a few more times.

 

The WK2 does a brilliant job of switching power around the place. I did the whole of the Simmo in high range and the dial on 'auto' and could feel it shifting power over some of the larger sand dunes on the WAA Line and at the top of some of the really chopped up hills I had all 4 wheels spinning apparently, however for the most part I could just cruise up them in 2nd @ 1200rpm with a slight blip of the throttle at the soft crest.
I only put it in 'Sand" mode for Big Red.