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Old 03-22-2012, 02:33 PM   #1
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4X4 Down Slope

I've heard a few different opinions on this. You're on a snow packed road in the mountains. You drive up the slope in 4WD, do you go back to 2WD for the down hill gradient (sometimes 5-10 miles) or leave it in 4WD?

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Old 03-22-2012, 03:05 PM   #2
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depends.... how slippery it is. 4WD high, but most of the time I down shift to 4 or 3 so I am not breaking. Let the engine do your breaking. Especially helpful when coming down the pass from ABasin

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Old 03-22-2012, 03:06 PM   #3
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Not snow, and don't know the right answer, but I ascended and descended a dune in 4hi, took it out of 4hi when I got to flat sand. Seemed to have more control that way.
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Old 03-22-2012, 03:07 PM   #4
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depends.... how slippery it is. 4WD high, but most of the time I down shift to 4 or 3 so I am not breaking. Let the engine do your breaking. Especially helpful when coming down the pass from ABasin
Yeah Loveland Pass and I-70 coming down to Dillion or Georgetown is what I was referring to
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Old 03-22-2012, 03:17 PM   #5
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keep it in 4wd, and if traffic is as it is on Sunday nights, shift to 4 or 3. MOst of the time coming down Loveland, i never have to break. sometimes it is in 4wd all the way home, as the slush/snowcover/ice sneaks up on you and having front wheels pulling keeps you straight (think front wheel drive vs rwd in snow) Once you hit clear pavement you will want to take it out of 4wd
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Old 03-22-2012, 03:47 PM   #6
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4WD downhill is fine if you have an open differential up front or a selectable locker like ARB or Eaton e-locker you can disenagage when going downhill.

Going dowhill with a locked front end can be handful on ice or hardpack snow.
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Old 03-22-2012, 03:59 PM   #7
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Luckily, my JKUR isn't a DD-

I shift to 4hi as soon as I get off pavement and back to 2wd, when I'm done for the day/week--

Last year I had the jeep in 4hi for three months 24/7--nice winter--not this one !

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Old 03-22-2012, 04:05 PM   #8
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I'm talking about stuff like this, most RWD cars and even some FWD cars get stuck when it's like this. Though pretty rare this Winter.



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Old 03-22-2012, 04:11 PM   #9
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I wouldn't have a locker engaged on the highway... your hands will be full before you can even think "uncle" Conditions like your pictures i am in 4wd, probably 2 (automatic) and as I state to my wife "it's all in the tires" . Her LC has blizzaks specifically for this type of driving.
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Old 03-22-2012, 04:24 PM   #10
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Can be tough driving-

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Old 03-22-2012, 04:36 PM   #11
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Can be tough driving-

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Old 03-22-2012, 05:00 PM   #12
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Based on the photos, unlock the diffs on the hwy always. 4-hi is good. As you slow to a stop with an automatic kick it into neutural. Once stopped put it back into gear.
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Old 03-22-2012, 05:05 PM   #13
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Based on the photos, unlock the diffs on the hwy always. 4-hi is good. As you slow to a stop with an automatic kick it into neutural. Once stopped put it back into gear.
Why in neutral?

Sometimes when the weather and ski traffic is bad you could be in stop/start for 3+ hours
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Old 03-22-2012, 05:07 PM   #14
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I don 't know where you ever heard that--


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Based on the photos, unlock the diffs on the hwy always. 4-hi is good. As you slow to a stop with an automatic kick it into neutural. Once stopped put it back into gear.
If you're driving an auto JEEP(42rle), never take it outta gear on the HIGHWAY--if you're off road, there are different reasons to go to neutral--but not on pavement-to many chances for mistakes/driving/emergency/sudden reason for acceleration--etc

Also loss of fluid pressure !

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Old 03-22-2012, 05:12 PM   #15
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With an automatic there is power sent to the wheels as long as it is in gear. On a slick downhill surface as you slow to a stop you are braking while power is still being sent to the wheels. Very easy to slide the back end around. At say 5mph if you bump it to neutural you will safely brake to a stop. Typically this works best pon hard packed snow or icy conditions. Try it some time.
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Old 03-22-2012, 05:23 PM   #16
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Can be tough driving-

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Old 03-22-2012, 05:37 PM   #17
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Boy howdy. I have no experience driving in sloshy, ice-snow roads like in the photo above, but plenty in rear-wheel drive trucks and cars. here's my question. when folks say lockers in this thread, does it count if you have an LSD in the front? I would think it would help.
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Old 03-22-2012, 05:38 PM   #18
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Quote:
Originally Posted by SilverBolt
With an automatic there is power sent to the wheels as long as it is in gear. On a slick downhill surface as you slow to a stop you are braking while power is still being sent to the wheels. Very easy to slide the back end around. At say 5mph if you bump it to neutural you will safely brake to a stop. Typically this works best pon hard packed snow or icy conditions. Try it some time.
X2 my father taught me this trick.
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Old 03-22-2012, 05:40 PM   #19
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Quote:
Originally Posted by baytownbert
Boy howdy. I have no experience driving in sloshy, ice-snow roads like in the photo above, but plenty in rear-wheel drive trucks and cars. here's my question. when folks say lockers in this thread, does it count if you have an LSD in the front? I would think it would help.
And LSD would help some, but an auto locker on slushy pavement will lock your wheels straight fast and make it very hard to turn. A LSD wont be anywhere near as bad. I imagine if it's bad enough to use 4wd it won't grab enough to cause trouble. Personally I rarely have to use 4wd on snowy roads. I just drive responsibly.

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