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Unread 12-19-2008, 12:02 PM   #1
twmattox
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**DD rigs only** how do you use 4wd on winter roads

A different thread got me thinking about this:

Around here, I use my part time (Dana 300) 4wd only when the roads are fully ice/snow covered. I know that dry pavement can kill the t-case. However, is it safe to use on roads that are mixed slush covered, wet pavement, snow cover? How much dry pavement does it take to bind a T-case? If I am cruising along and hit a patch of 300' dry pavement, will the rig grenade???

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Unread 12-19-2008, 12:31 PM   #2
hh65flyer
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Check out the "How Fast is Too Fast" active thread. I think your questions will be answered.
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Unread 12-19-2008, 12:35 PM   #3
Gunga
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If you maintain a straight line you'll have less chance of damage. Turning your wheels on dry pavement in 4wd will cause problems.
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Unread 12-19-2008, 12:42 PM   #4
twmattox
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The how fast is too fast is the thread that got me thinking. Rather than hijacking that thread...I started a new one.
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Unread 12-19-2008, 12:48 PM   #5
RenegadeKing81
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I don't think that 300 feet will do anything to the T-case. Turning the vehicle on dry pavement while in 4wd may. With part time 4wd set ups the tires can spin at different speeds while turning. Full time 4wd rigs don't have this issue. This isn't much of an issue while off road due to the tires not being able to grab the surface as well as they would on a dry road. So, as far as hitting a dry patch of road in the snow I wouldn't worry too much about it. Nor would a turn here or there cause too much of an issue. I just wouldn't keep in four wheel drive when it is just a little wet out there.

I see that you are in Indiana, did you get the same ice storm that we had here in Illinois?
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Unread 12-19-2008, 12:51 PM   #6
SlikRic
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Just switch to 2hi for the dry section then back to 4 hi when you get to snow/ice covered. A little practice and it becomes almost second nature, just like shifting gears. Good Luck, it's Sunny and 81* here
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Unread 12-19-2008, 03:23 PM   #7
243
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Originally Posted by SlikRic View Post
Just switch to 2hi for the dry section then back to 4 hi when you get to snow/ice covered. A little practice and it becomes almost second nature, just like shifting gears. Good Luck, it's Sunny and 81* here
You have never shifted my D300...all I can say is she's a b@&$!
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Unread 12-19-2008, 05:03 PM   #8
tomthbomb
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Back in 1978 when my CJ-7 was still pretty new I drove 20 miles to home with the D20 in 4wd.
I drove it with the D20 for another 25 years without any problems before I swapped in the D300.
Your mileage may vary and no cold beer was involved on that occasion.
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Unread 12-19-2008, 05:10 PM   #9
SlikRic
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Quote:
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You have never shifted my D300...all I can say is she's a b@&$!
I've read alot of your posts, so I'm pretty sure the answer is yes, but have you changed your T-case fluid lately. Made a huge difference for me with the D300.
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Unread 12-19-2008, 05:26 PM   #10
pscj5
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as on the other forum page it wont die even if the pavement is dry not for short periods of time just dont be goin 80 lol that prolly not even posible but lower speeds in 4wd hi wont kill a tcase now if you are makin bunch of u turns i may switch out of it but other than that mild turns wont hurt you or even stretches of just moist road. but good luck
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Unread 12-19-2008, 07:22 PM   #11
John Strenk
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I just slip mine in and out of 4WD as I start to feel it bind up. Since the roads are pretty bad when I'm out plowing I use 4WD a lot in the winter. It also seems to help with my braking.

300 feet won't kill it at all.
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Unread 12-19-2008, 08:46 PM   #12
jeepdaddy2000
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Originally Posted by John Strenk View Post
I just slip mine in and out of 4WD as I start to feel it bind up. Since the roads are pretty bad when I'm out plowing I use 4WD a lot in the winter. It also seems to help with my braking.

300 feet won't kill it at all.
X2. Simply leave the hubs locked in and pop the t case in and out as needed.
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Unread 12-22-2008, 09:08 AM   #13
twmattox
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Originally Posted by jeepdaddy2000 View Post
X2. Simply leave the hubs locked in and pop the t case in and out as needed.
This is what I typically do. However, I have to reach for the 4wd shifter and don't want to do it 50+ times for a drive home (as I drive this daily).

As far as making the shift easier. If you accelerate as you shift into 4wd and decelerate as you shift back into 2wd it makes it significantly easier to shift. The decelerate is not simply a lifting your foot off the gas...more like goosing the gas and as you are letting off of the gas, shift...

As far as the ice storm. Yes, we got hit. Fortunately, not as bad as friends further north. Our ice was followed by rain a few hours later and the rain got rid of all the ice...
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Unread 12-22-2008, 12:51 PM   #14
VaCJ79
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how long can you drive around with the hubs locked in 2H? Where I am its bad in town but the roads outside of town are for most part clear.
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Unread 12-22-2008, 02:17 PM   #15
druxus
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For the past couple of years the snow has been bad here on Michigan's west coast. I DD a 72 cj5 80 miles to work and back home with hubs locked and half the time in 4x4 with no problems.

We got slammed good here in Muskegon ... about 2 ft worth since last friday and more predicted most of the week
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