I'm pretty sure this is normal as I've noticed it on my truck and my Dad's Chevy, but I'm not 100% sure why it happens. With 4x4 on, why is it that when turning, even slightly, the truck jerks? The reason I'm bringing this up is because a friend is looking to get a new charger with AWD and it got me thinking about the differences. From what I've read, it seems like with 4x4, all wheels spin the same, so I'm guessing that is what the jerking is -- since all wheels are spinning the same, it bounces around turns. Is this right? If so, what is the difference between AWD and 4x4. I've read AWD can be used on dry pavement without any consequences but I'm not sure why.

While we are on the subject, what makes 4L different from 4H, mechanically?

 

it should not jerk if 4wd is being used on the proper surfaces! NOT DRY PAVEMENT!

4low is provided by a gear reduction set in the transfer case. 2.72:1 in the 231D

 

I've definitely noticed slower turning / jerkiness while turning in both trucks while in 4x4 on snowy roads (while plowing in the Chevy). Was I wrong when I said all wheels are spinning the same in 4x4?

 

Well, technically, yes. Unless you have the differentials locked (or at least have a limited slip), true 100% power will only be supplied to one wheel on each axle. So, as in most cases with a stock 4x4 pickup, it is truly only a 2x4 That being said, quite often both tires will spin on the same axle.

As far as the jerkiness goes...thats very common, even in snow. While turning quite sharp with the front axle engaged some jerkiness will be experienced, even in low traction situations.

All wheel drive units consist of a different "transfer case" that has a differential inside of it, which makes for much better operation on pavement. A 4x4 transfer case does not, and delivers 50% power to each axle at all times.

 

completely normal try not to let it jerk too much cause thats the axle u-joints bindeing and it will wear out the u-joints faster. try doing it with a spool up front without the cable opp disconnect, it sucks lol

 

our trucks are considered part time 4wd and have no center differential. that causes them to bind, skip, jerk, and be difficult to turn.

a true All Wheel Drive (AWD) has a center differential and will not behave like our trucks. they drive and steer normal.

 

Yep, for the most part. My wifes Yukon Denali is AWD, and what seems surprising to me is the dang thing is smooth as silk when turning sharp on dry pavement, but for some reason we experience minor jerking (very minor in comparison to a 4x4) while turning sharp on snow, such as in the driveway. Weird

 

Clear your driveway off better...

 

Am I sensing sarcasm here?
I don't worry too much about a little snow on my driveway. I mean, I live in northern MI. Snow is kinda frequent here.

I just thought is was weird that it will turn on dry pavement without jerking, yet throw in a loose surface such as a little snow and it will jab the wheel back and forth a bit.

 

as he said, part time 4x4 has no center diff between axles. jerking is really hard on your transfer case and should be avoided especially if your running bigger tires.

I always wondered how rock climbers don't break more 4x4 parts. that's even worse than flat dry pavement i would imagine.