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Old 11-17-2014, 06:20 PM
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Question about 4 wheel drive modes

I am the proud owner of a 2 week old Cherokee Trailhawk that so far is operating just fine; no complaints. I have read the manual, searched a lot on the internet and consulted my dealer, but I canít find specific information to the following questions. So, here I am at the Jeep Garage.

I understand that when the terrain selector switch is in the Auto mode the vehicle operates in front wheel drive unless the computer senses poor traction. Then it automatically engages the rear axle, resulting in 4 wheel drive. After good traction is regained, the rear axle is automatically disconnected. So, if you are driving on a paved road that has alternating patches of slick icy road and dry road, the rear axle may be repeatedly engaged and disengaged. Right so far?

Now to Snow and Sand/Mud modes. If the terrain switch is set to either of these two modes and the vehicle is being driven on alternating slick and dry surfaces as above, is the vehicle always in a full time four wheel drive mode, or does it still switch back and forth between front wheel and four wheel drive according to the traction encountered? Does engaging Low Range make any difference in either of the above situations?

How about Rock mode? I know that Rock mode is only available in Low Range. Is the vehicle always in four wheel drive in Rock Mode or does it switch back and forth depending on traction? How about with the rear differential locked; any switching back and forth in that situation?

I have talked to the Service Manager and my Salesman at the local dealer where I bought my Trailhawk. Neither of them could answer my question.

Thanks for any information you can give me.

Dick
Roosevelt, Utah

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  #2  
Old 11-17-2014, 06:44 PM
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Re: Question about 4 wheel drive modes

I am not sure of the full answers to your questions either. You do understand that when you turn the transmission dial you are not doing anything mechanical but instead changing software programs?
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Old 11-17-2014, 07:01 PM
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Re: Question about 4 wheel drive modes

See if this video helps:
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Old 11-18-2014, 10:51 AM
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Re: Question about 4 wheel drive modes

Quote:
Originally Posted by uintahbasin View Post
I am the proud owner of a 2 week old Cherokee Trailhawk that so far is operating just fine; no complaints. I have read the manual, searched a lot on the internet and consulted my dealer, but I canít find specific information to the following questions. So, here I am at the Jeep Garage.

I understand that when the terrain selector switch is in the Auto mode the vehicle operates in front wheel drive unless the computer senses poor traction. Then it automatically engages the rear axle, resulting in 4 wheel drive. After good traction is regained, the rear axle is automatically disconnected. So, if you are driving on a paved road that has alternating patches of slick icy road and dry road, the rear axle may be repeatedly engaged and disengaged. Right so far?

Now to Snow and Sand/Mud modes. If the terrain switch is set to either of these two modes and the vehicle is being driven on alternating slick and dry surfaces as above, is the vehicle always in a full time four wheel drive mode, or does it still switch back and forth between front wheel and four wheel drive according to the traction encountered? Does engaging Low Range make any difference in either of the above situations?

How about Rock mode? I know that Rock mode is only available in Low Range. Is the vehicle always in four wheel drive in Rock Mode or does it switch back and forth depending on traction? How about with the rear differential locked; any switching back and forth in that situation?

I have talked to the Service Manager and my Salesman at the local dealer where I bought my Trailhawk. Neither of them could answer my question.

Thanks for any information you can give me.

Dick
Roosevelt, Utah
Basically in Auto its in FWD. If conditions dictate the need it goes into 4WD. It will default back to FWD as conditions dictate.
In the other 4WD modes the Cherokee stays in those modes till you dial out. That is unless you shut off the engine. Then I believe it defaults back to "auto". So if you set a 4WD mode it stays in 4WD till you change the mode or shut off the engine.
That said the different 4WD modes will produce different % traction to the front vs rear wheels. If you are a stickler for detail that will be key for you.
For me Sport and Snow has been all I have used.
Sport mode is suppose to be the fun 4wd mode. It produces more RPM's and better response driving. That it does.
I would guess that unless you are in a tough driving situation, especially off road you would not need Low range, as it requires very low speed.

If I am getting into a rough dirt/ muddy road or a gravel road going over a river levy I just put it into snow mode or even sport mode. All I know is that its in 4WD and its never failed me.
Have fun on those Utah trails with that Trail Hawk.
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Old 11-18-2014, 01:04 PM
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Re: Question about 4 wheel drive modes

......So, if you are driving on a paved road that has alternating patches of slick icy road and dry road, the rear axle may be repeatedly engaged and disengaged. Right so far?

YES

Now to Snow and Sand/Mud modes. If the terrain switch is set to either of these two modes and the vehicle is being driven on alternating slick and dry surfaces as above, is the vehicle always in a full time four wheel drive mode, or does it still switch back and forth between front wheel and four wheel drive according to the traction encountered?

STAYS IN 4WD

I cannot answer the rest as I do not have a Trailhawk, but others have posted good info. Good luck!
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