Wheel Spin Question - TrailHawk - 2014+ Jeep Cherokee Forums
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post #1 of 31 (permalink) Old 11-26-2013, 08:08 PM Thread Starter
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Wheel Spin Question - TrailHawk

I am a newbie on the forum as of today but not a newbie to 4wd and all-wheel drive autos.

Picked up the 6CL, 4WD TH on Thursday and drove 50 miles home in the rain. Not being familiar with the car .....from a stop I accelerated and the rear wheels spun on the wet asphalt. Didn't think anything of it until yesterday when I juiced it too much and the wheels unexpectedly spun on dry pavement.

The 4wd has been on Auto and I'm wondering whether any of you have experienced something similar, is it normal, or am I doing something wrong? None of my Audi's, or Mitsubishi's have demonstrated this.

BTW....... I love this car!!!!!

Bob
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post #2 of 31 (permalink) Old 11-26-2013, 08:13 PM
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Congrats on the purchase & welcome aboard.

I haven't yet received my TH so can't answer your question. I sure other will soon respond and I'll also be looking for their replies.

Bill
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post #3 of 31 (permalink) Old 11-26-2013, 09:41 PM
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If they rear wheels are spinning that's a good thing

The 4WD system will sense higher throttle position and/or front wheel slip and activate the rear wheels so you can get going with little fuss.

I haven't played around with the 4x4 system in depth yet, but power to the rear wheels means the front could have been slipping.

Based on the week we had our limited before the problems started, the V6 has more than enough juice to light up the tires from a stop, even from a roll when the pavement is wet.

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post #4 of 31 (permalink) Old 11-27-2013, 07:34 AM
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I think I just read another post advising that tires are overinflated when shipped from the factory and that dealer prep is supposed to reduce tire pressure to 31 psi as recommended. If dealer missed this step, over inflated tires could be part of the problem - might be worth checking.

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post #5 of 31 (permalink) Old 11-27-2013, 09:04 AM
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I recall from my reading and watching every freakin' thing Cherokee on the web....

If the windshield wipers are going, the "auto" system automatically diverts some power to the rear wheels as the system assumes if you are using the wipers, it must be raining.

Also, the 4x4 system will automatically divert some power rearward if you step on it, because it knows there is the possibility of front wheel slip if it doesn't. Other (inferior) systems - the "slip THEN grip type", (think CR-V) will allow front wheel spin first, then send power rearward.

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post #6 of 31 (permalink) Old 11-27-2013, 04:24 PM Thread Starter
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Quote:
Originally Posted by Erie-Eyes View Post
I think I just read another post advising that tires are overinflated when shipped from the factory and that dealer prep is supposed to reduce tire pressure to 31 psi as recommended. If dealer missed this step, over inflated tires could be part of the problem - might be worth checking.
That's interesting. The dealership inflated the tires (and the cost of the car) with Nitrogen to about 37psi as indicated by the sensors. Wouldn't the lower pressure decrease the mileage? If so I won't have such a heavy foot and keep the pressure a bit higher.

Thanks for the feedback.

Bob
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post #7 of 31 (permalink) Old 11-27-2013, 06:21 PM
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Bob, check out post #5 in this thread: Tire Pressure?

Bottom line: Over inflated tires don't help fuel economy and have more negative consequences than good.

Hope this helps!!
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post #8 of 31 (permalink) Old 11-28-2013, 06:55 AM
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Thanks for the tip about tire pressure. Will have to check today. My TH spins the reR wheels in the rain also. 3.2L engine
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post #9 of 31 (permalink) Old 11-28-2013, 03:38 PM Thread Starter
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Quote:
Originally Posted by RallyBud View Post
Bob, check out post #5 in this thread: Tire Pressure?

Bottom line: Over inflated tires don't help fuel economy and have more negative consequences than good.

Hope this helps!!
Thanks. The dealer who sold the car at a great price tacked on only one added fee that was disputable but I did not make too much of a fuss. The charged a whopping $178 for Nitrogen filled tires. Currently the PSI indicated by the panel is 36 cold. The door recommends 33. I am inclined to reduce the pressure by at least 3 psi at this time based upon the door pillar and the discussion in the thread referenced.

Thanks
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post #10 of 31 (permalink) Old 12-14-2013, 06:42 AM
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Yes - tire spinning - it is not so limited - front/rear torque bias has different program thinking and is certianly different than Mistsu or Audi

I really really enjoy the off road tire slipping and traction while it holds a straight line
- all part of the genius of this vehicle.

If the superior engineering of this vehicle becomes fully recognized the wait for one could be very long.

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