4wheel drive out? - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 39 Old 03-25-2013, 05:34 PM Thread Starter
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4wheel drive out?

I have an 07 JKU with a 2" lift on 20" rims. Tires I think are 32's.

At a friends over the weekend, I was parked on a muddy incline in 4 wheel drive. I went to leave and back up the hill and I just started sliding down it. At the bottom of the hill, I tried again to backup some and I was spinning with the traction control going crazy. I stopped and turned traction control of by pushing the button and tried again. With gas pushed down the passenger's side rear wheel would spin but no others would spin and I did not move.

So is my 4 wheel drive screwed? What steps do i need to do to troubleshoot?

Thanks in advance for any help
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post #2 of 39 Old 03-25-2013, 05:37 PM
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You are supposed to be in 4-low, where the traction control is disabled. 4hi is intended for slick roads, not muddy hills, sand, rocks, etc. I'll bet the front was spinning as well, unless you broke the tcase linkage.

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post #3 of 39 Old 03-25-2013, 05:48 PM Thread Starter
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Thanks for the reply. I thought 4 low was for worse than that... guess I never new. I have been using 4 high.

I was watching the front drivers side and it was not spinning for sure.

I was thinking or maybe even hoping that it was just a result of not being able to fully disable the traction control
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post #4 of 39 Old 03-25-2013, 06:17 PM
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Unless you have a rubicon or aftermarket lockers 4wd means one front wheel and one rear wheel spin. You need lockers in addition to 4wd to put power to all 4 wheels when none of them have traction.
You don't mention anything about lockers so I'm guessing you don't have those.
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post #5 of 39 Old 03-25-2013, 06:49 PM Thread Starter
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I did not realize that.. I thought the Jeeps were all 4 wheels. Thank you for the help. I guess I will need to look into lockers, just an excuse to upgrade
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post #6 of 39 Old 03-25-2013, 07:22 PM
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Quote:
Originally Posted by wkyjku View Post
I did not realize that.. I thought the Jeeps were all 4 wheels. Thank you for the help. I guess I will need to look into lockers, just an excuse to upgrade
the term "4 Wheel Drive" is used very very loosely in the auto industry. when your tires lose traction, your differentials will spin the tire with least traction.

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post #7 of 39 Old 03-25-2013, 07:31 PM
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Re: 4wheel drive out?

Quote:
Originally Posted by wkyjku View Post
I did not realize that.. I thought the Jeeps were all 4 wheels. Thank you for the help. I guess I will need to look into lockers, just an excuse to upgrade
It sounds like you need to read up on lockers and differentals first. Here ya go.

http://ezinearticles.com/?Differenti...ey?&id=1232619

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post #8 of 39 Old 03-25-2013, 08:24 PM Thread Starter
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That is a good read. I love my Sahara but this makes me wish I would have went the Rubi route instead. I can't stand to get stuck in someones back yard.
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post #9 of 39 Old 03-25-2013, 08:50 PM
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The traction control system is 'supposed' to automatically apply some brake pressure to the spinning tire to transfer power to the one with traction. This simulates having a weak limited slip in the diff, but is better than nothing.

If you run into this situation again, (before you add lockers/limiteds, anyway), try giving the brakes a little more pressure and see what happens.
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post #10 of 39 Old 03-25-2013, 08:54 PM Thread Starter
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Thanks Green, I'll give that a try. I def didn't try that. I was able to turn tight enough to miss her outbuilding and drive forward to get out of the situation.
My sahara did come with the Rubicon rear end - not sure how that helps me though. It's on the original build sheet as an option the original owner went with.

Thanks for all the info
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post #11 of 39 Old 03-25-2013, 09:04 PM
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My sahara did come with the Rubicon rear end - not sure how that helps me though. It's on the original build sheet as an option the original owner went with.
Ready to smack yourself in the forehead ??

Look on the switch panel below your ac/vent controls. See the button that says Axle Lock?
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post #12 of 39 Old 03-25-2013, 09:56 PM
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Originally Posted by wkyjku View Post
Thanks Green, I'll give that a try. I def didn't try that. I was able to turn tight enough to miss her outbuilding and drive forward to get out of the situation.
My sahara did come with the Rubicon rear end - not sure how that helps me though. It's on the original build sheet as an option the original owner went with.

Thanks for all the info
Quote:
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Ready to smack yourself in the forehead ??

Look on the switch panel below your ac/vent controls. See the button that says Axle Lock?




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post #13 of 39 Old 03-25-2013, 10:20 PM
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20' wheels and 32' tires? hmmm........

What kind of tires are you running?
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post #14 of 39 Old 03-26-2013, 01:29 PM Thread Starter
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haha.. I looked for that switch, it is not on the Sahara. I am not sure why the original owner upgraded to the Dana44 (i think that is right) and not have this option.

I admit, I am all new to this... there is probably a reason.
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post #15 of 39 Old 03-26-2013, 01:45 PM Thread Starter
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Tires are Generals. Not sure the details, but I will look tonight.
Id get the build sheet out of the glovebox too but the girlfriend broke the handle on it and I can't access it anymore... ha
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post #16 of 39 Old 03-26-2013, 04:10 PM
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All JK models have rear Dana 44 out of the factory with the exception of some early 07 which had rear Dana 35. The electronic brake assist traction control works pretty good but it bleeds off 50% of torque with the brake it applies thus it can bog you down too much if you use it in 4Hi.


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post #17 of 39 Old 03-26-2013, 07:28 PM Thread Starter
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Mine is an early 2007, so looks like that is what happened.
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post #18 of 39 Old 03-27-2013, 06:58 AM
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You don't have a "Rubicon rear axle." You have a Dana 44. There is a difference.

You don't understand how differentials work. You probably should. May as well research your transfer case while you're at it so that you know why your "4wd" doesn't just "go out."

You have 20" wheels. Fix that.
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post #19 of 39 Old 03-27-2013, 07:15 AM
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post #20 of 39 Old 03-27-2013, 07:21 AM
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If your running 20"s you probably have street tires- and 4lo with lockers cant help that.

Intercotires.com... IROK. You will have uber-traction, and your friends yards will NEVER recover.

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post #21 of 39 Old 03-27-2013, 07:30 AM
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Quote:
Originally Posted by Dancin Dan View Post
OP: click link. Learn stuff.

http://m.youtube.com/watch?v=K4JhruinbWc
Thats a great video to conceptualize how a diff works.

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post #22 of 39 Old 03-27-2013, 07:47 AM
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Intercotires.com... IROK. You will have uber-traction, and your friends yards will NEVER recover.
Fawking LOL.
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post #23 of 39 Old 03-27-2013, 07:57 AM
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Quote:
Originally Posted by DeucesALLin View Post
If your running 20"s you probably have street tires- and 4lo with lockers cant help that.

Intercotires.com... IROK. You will have uber-traction, and your friends yards will NEVER recover.
Agreed. It's a traction problem not a torque problem. Low range won't make any difference. Mud tires are what he needs.

Even with mud tires you can still get stuck sometimes... mud that's really really thick like clay can fill up the spaces in the tread and it won't come out. Then the tires behave like racing slicks. So they're not perfect... but they're a huge step up from all seasons.
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post #24 of 39 Old 03-27-2013, 07:59 AM
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Thats a great video to conceptualize how a diff works.
Yup. I think I found that here somewhere. Best characterization of how a differential works I've found online.



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post #25 of 39 Old 03-27-2013, 10:05 AM Thread Starter
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Quote:
Originally Posted by Imped View Post
You don't have a "Rubicon rear axle." You have a Dana 44. There is a difference.

You don't understand how differentials work. You probably should. May as well research your transfer case while you're at it so that you know why your "4wd" doesn't just "go out."

You have 20" wheels. Fix that.
I have General Grabber II's, they calim they are a AT tire. This is a daily driver so I am guessing I should stick to an AT over a straight MT.

I'll def watch that video tonight!
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