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Old 01-12-2011, 03:16 PM   #1
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Maximum Speed in 4H

According to the owner's manual, you can shift from 2H to 4H at speeds up to 50 miles per hour. It does not tell you what the maximum speed you can drive in 4H. Living in Atlanta, we get some snow and you can be driving on a snow or ice road that suddenly gets dry. Is it okay to drive a normal highway speeds in 4H on dry roads? Please let me know. Thanks.

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Old 01-12-2011, 03:20 PM   #2
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Quote:
Originally Posted by cremaley View Post
According to the owner's manual, you can shift from 2H to 4H at speeds up to 50 miles per hour. It does not tell you what the maximum speed you can drive in 4H. Living in Atlanta, we get some snow and you can be driving on a snow or ice road that suddenly gets dry. Is it okay to drive a normal highway speeds in 4H on dry roads? Please let me know. Thanks.
You should not be in 4wd on dry pavement. Period. If you truly need 4h, you shouldnt be driving over 55.

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Old 01-12-2011, 03:25 PM   #3
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Pakman55: Thanks for the quick response. Will only use on snow or ice and not on dry pavement.
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Old 01-12-2011, 03:29 PM   #4
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Originally Posted by cremaley View Post
Pakman55: Thanks for the quick response. Will only use on snow or ice and not on dry pavement.
*and on the trail*
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Old 01-12-2011, 03:30 PM   #5
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My rule is, if there are patches of dry road for more than a few car/jeep lengths, I switch back to 2WD, then when back on snow covered pavement, back to 4H if necessary...
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Old 01-12-2011, 03:30 PM   #6
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The reason for that is that Wranglers have a part time 4WD system as opposed to the weaker fulltime AWD systems that have a center differential.
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Old 01-12-2011, 03:39 PM   #7
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If you're going 50+ mph, 4wheel drive isnt going to help you that much or be useful. You just dont need it if your going that fast, I personally don't go above 35 in 4wheel drive.
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Old 01-12-2011, 04:00 PM   #8
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If you're going 50+ mph, 4wheel drive isnt going to help you that much or be useful. You just dont need it if your going that fast, I personally don't go above 35 in 4wheel drive.
35-40 is my max, but if I'm using it I'm usually in snowy conditions that calls for slow driving so I'm at around 20-30
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Old 01-12-2011, 04:12 PM   #9
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Originally Posted by wrangler0 View Post
35-40 is my max, but if I'm using it I'm usually in snowy conditions that calls for slow driving so I'm at around 20-30
X2 with the last posts. If I'm at 35-40 I don't need it 99% of the time.
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Old 01-12-2011, 04:32 PM   #10
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Its the ENGINEERING FAQs of JEEP

Quote:
Originally Posted by cremaley View Post
According to the owner's manual, you can shift from 2H to 4H at speeds up to 50 miles per hour. It does not tell you what the maximum speed you can drive in 4H. Living in Atlanta, we get some snow and you can be driving on a snow or ice road that suddenly gets dry. Is it okay to drive a normal highway speeds in 4H on dry roads? Please let me know. Thanks.
http://www.jeep.com/en/4x4/faqs/

I think you will find it quiet useful to you, in case you dont want to go throught it, the answer to ur Q is that you shouldnt drive faster than the road speed limit !!
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Old 01-12-2011, 04:34 PM   #11
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Sorry forgot to post the link
Jeep - 4x4 Basics - Engineering FAQs - 4WD SUVs
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Old 01-12-2011, 05:03 PM   #12
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Still, it's sometimes difficult to decide whether to go for 4H or 2H. In town with snow you can't constantly shift between them and when driving up the mountain in snowy conditions, 2wd is absolutely no go but 4H with locked diffs is not great eather. Have to admit that the LandRover Freelander II is more convenient in those cases....has heated seats as well.....and a bigger luggage space.....the rear seats are easily accessible and at least you can decently sit over there......drives faster too, and a more quiet ride........didn't even mentioned the fuel consumption........hmm, time to go to sleep and think about what the hell I just said
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Old 01-12-2011, 05:10 PM   #13
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Heh Heh, I don't know what the problem must be, in my little NorNv town, right on hiwy I80-I just leave it in 4hi all thru jan/Feb and sometimes going into march-No lockers, cause the snow isn't deep enough !!

There's some dry hiwy travel, but not much and leaving it in 4hi--there's no sudden troubles !!

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Old 01-12-2011, 07:50 PM   #14
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I was wondering the same thing because I heard a loud grinding noise and then something that sounded like it was dragging behind my Jeep as I was going 75 in 4H the other day?
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Old 01-12-2011, 08:51 PM   #15
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Quote:
Originally Posted by ESP123
I was wondering the same thing because I heard a loud grinding noise and then something that sounded like it was dragging behind my Jeep as I was going 75 in 4H the other day?
It was on fire right? That's the turbo boost. No worries.
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Old 01-12-2011, 08:54 PM   #16
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Old 01-12-2011, 08:59 PM   #17
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I'm happy with my JK in 2wd in the snow so far. As long as your paying attention and not in totally deep snow the JK goes on snow pack with out much problem and the ESP works great. I'm just saying we had 6 inches here last night and the roads were plowed and snow packed and I never even considered 4wd and being used to driving in snow I went just fine.

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