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Old 01-22-2011, 10:15 PM   #1
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Engaging 4 wheel drive

I have a question. I have seen some posts warning do not go over 50 in 4 wheel drive. My question is if the roads have snow on them and are somewhat slippery. Can you go over on the 50 on the highway? I'm sure I'll get my balls busted for not knowing but I don't want to screw up my 4 wheel drive for when I go offroading.

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Old 01-22-2011, 10:20 PM   #2
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No. If you can safely go over 50, you don't need 4wd.

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Old 01-22-2011, 10:37 PM   #3
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I agree with MTH. Plus if it's slippery you shouldn't really drive that fast anyway.
But it is possible because I've done it, but that probably wasn't a good idea, because my jeep survived but the work trucks transfercase did not.
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Old 01-22-2011, 10:39 PM   #4
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you wont hurt anything but don't be like some people who think just because it's 4wd you can go 70 on an icy highway and nothing can stop you.
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Old 01-22-2011, 10:44 PM   #5
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According to my owners manual in my Dodge Ram, 2008 Rubicon, 2011 Sahara, you must shift into 4 wheel drive before 55mph. You can go past 55 after that. I do it all the time on the hwy, good for stability.
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Old 01-22-2011, 10:46 PM   #6
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Your part time 4WD system is much different than most SUVs that have AWD. There is some really good information in your owner's manual that explains when you should and shouldn't use it. You can download a copy at www.jeep.com. Go to the "for owners" section to download it.
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Old 01-23-2011, 12:46 AM   #7
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you wont hurt anything but don't be like some people who think just because it's 4wd you can go 70 on an icy highway and nothing can stop you.

Thanks everyone for your input. I totally understand that 4 wheel drive does nothing for stopping ability or icy conditions. I simply was wondering how much the tranfer case can handle.
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Old 01-24-2011, 02:24 PM   #8
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Mind that Rubi's chain-based case is different from gear-based case. In any event, you are killing tires. Since there is no inter-axle differential in part-time t-case, a tire must always slip by a small amount due to minute differences in load, pressure, natural wear. It happens even without turning.
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Old 01-24-2011, 02:51 PM   #9
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What is the top speed for 4W-lo???
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Old 01-24-2011, 02:55 PM   #10
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What is the top speed for 4W-lo???
In a JK, it's 25 mph. You've got a TJ though.
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Old 01-24-2011, 03:39 PM   #11
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In a JK, it's 25 mph. You've got a TJ though.
Haha yeah I know
Does anyone know what it is for a TJ
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Old 01-24-2011, 04:08 PM   #12
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^ when the engine starts winding out. By then you should be in 4hi, lower gear. (probably around 20). 4hi 1st or 2nd is always better/easier on the jeep than 4lo 3rd or 4th

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