I've just read this thread and my head hurts!![]()
ATRAC is only available when the center diff is locked and you are in 4lo.
Not to confuse further, but I'm pretty sure this is wrong. (Didn't want a noob reading this sometime in the future and believing it is all.
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How so? Spinning wheels is easy with the CDL locked in 4hi, not so much when in 4lo. ATRAC is most aggressive when in 4lo.
Was about to come on and edit the post and add that you probably meant VSC is not active with the center diff locked. VSC = Vehicle Stability Control which is the de-throttling you feel where the computer cuts the gas. ATRAC is always active until like 2500 or 3000 RPMs or something like that (whether in 4hi/4low, diff locked/unlocked.)
I'm pretty sure that's how it all boils down at least from my research/experience. Hopefully I'm not saying something wrong.
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I agree with the VSC comment. ATRAC controls brakes to move the power from the spinning wheels to the wheels that have grip and is therefore only available when the diff is locked. VSC does not do anything like this - it simply cuts power.
I know I have redlined in 4hi with the center diff locked while messing around in the snow with no *****ing from the brakes. The same cannot be done in 4lo.
With all the snow on Saturday, I had the truck in 4h. Then on Sunday with clear dry roads, I forgot to disengage it and did about 30 min of highway driving and then this morning I realized I was still in 4h.
Could this Have damaged anything in the 4 wheel drive system?
4H is just fine anywhere as long as the center differential is not locked. If you JUST see the green 4WD icon, and NOT the one that's orange with an X on the drivetrain than you're fine. I periodically turn on my 4WD unlocked on dry roads to help with handling, and I always turn it on when the roads get wet, just so that I've got a sure footing if I need to step on it.
is this correct? it says you can switch into 4hi under 62mph, when you do the orange with x comes on, does that mean it's locked? I assumed it meant unlocked?
I've read the manual and I don't think I truly understood what it was talking about.
This thread is so full of FAIL! it is ridiculous! I would suggest everyone take everything they read in this thread with a grain of salt or dismiss it and get accurate info elsewhere, also it seems like clockwork is on a rampage of inaccuracies...:snacker:
Hun?...Say What!?! Who's on first? This thread is making me freak out. You're talking about a 4th Gen right.....?? First post has a 4th Gen in the sig, and there is talk and comparission between the V6 and V8, so it must be about the 4th Gen.
The V8 and V6 4x4 systems are totally different. No they aren't. Their identical aside from the 2wd option on the V6. The V8 in normal driving behaves as an AWD car. It has the center differential, a Torsen center to be more specific. It will supply 60-70% to the rear and 30-40% to the front, all the time. It does not supply 100% to the rear and then send some to the front when needed. Front and rear are always powered, it only shifts power front-back as and when needed. Wrong again, it constantly shifts power throughout corners in addition to when it senses slip. The V8's only have 4Hi and 4Lo as drive options. In either of these modes the V8 4runner will operate in AWD. So you can essentially drive in 4lo while in AWD and not have driveline bind. The V8 gives the option to lock the center differential. Once this is locked, in either 4Hi or 4Lo then the V8 4runner is operating as a true 4x4 with 50% to the rear and 50% to front. In either model the differentials themselves do not have a limited slip anything..... but instead rely on Atrac when in 4x4 mode instead to do something similar.
The V6 4th Gen 4runner has the typical standard 4x4 system. It is 2hi, 4Hi, 4Lo. 2Hi for normal driving, 4hi maybe for driving on snow, light offroading gravel roads and sand and stuff, and 4lo for heavy offroading and rock crawling etc.... when lots of torque and control are needed. No AWD function or option. Wrong, 4hi is that AWD option and operates identical to that of the V8 And it does not have a center differential. Uhm, yes it does. And if it does have an AWD mode and a center differential and the ability to lock it, then my whole 4th Gen 4Runner world as I know it has just been shattered.
All this to say that with the V6 4Runner, when in 4x4 mode, you shouldn't be driving it for long distances on dry pavement, and make a habbit of it. If you turn it on when there is snow, and forget to shift/turn it back to 2hi things should be ok, it is not the end of the world. But it is not intended to be left in that mode indefinitly. Wrong, you can drive in 4hi 24/7 all year on all terrain with no malfunction or premature wear.
To lube up components, turn on 4hi and find a fairly straight road or highway to do that. Not circles and zig zags in the parking lot. Which is a good intro to my next point. Yet again - wrong. Driving in 4hi lubricates nothing. Utilizing the actuator to shift from 4hi to 2hi and back is the only item that benefits from such practice.
If you want to test stuff out. Go to a parking lot, find a nice tight parking spot, and stick it in 4x4, if you can turn as easily as when you were in 2hi, you may have a center diff, if you feel like there is more pressure to turn and it feels like it is hoping, then you don't have a center diff.
Also, the center diff lock button is on the dashon the left of the steering colum. It has the icon of 4 wheels, axles and drive shaft, the front wheels are turned, with a little "X" over the diff as if to indicate no turning. No button, no center lock.
Not quite accurate. I have a 2003 SR5 V6, and I have MultiMode 4WD. The only reason V6's have 2H is for gas savings. We have the exact same center diffs the V8's do.
No, they're not. For the 4th Gen, both the V8 and V6 have a Torsen center diff. The only difference is that the V6 is multi-mode, with a 2H option. There is no other difference for the 4th gen.You're talking about a 4th Gen right.....??
The V8 and V6 4x4 systems are totally different.
It does have the same locking Torsen center diff as the V8.And if it does have an AWD mode and a center differential and the ability to lock it, then my whole 4th Gen 4Runner world as I know it has just been shattered.
Dude, you're wrong. The 4th Gen V6 has a Torsen center diff and you can drive it in 4WD on dry pavement all you want, provided the center diff is left unlocked. This is just the same as the 4th Gen V8.All this to say that with the V6 4Runner, when in 4x4 mode, you shouldn't be driving it for long distances on dry pavement, and make a habbit of it.
Not quite accurate. I have a 2003 SR5 V6, and I have MultiMode 4WD. The only reason V6's have 2H is for gas savings. We have the exact same center diffs the V8's do.
All that was needed was, a comment indicating that regardless of V6 or V8 4hi is equivalent to AWD.