Quote:
Originally Posted by JCL
X drive doesn't have a full lock, that isn't part of the design. What the clutches do is vary torque balance from front to rear, they don't lock together the front and rear output shafts, those remain open.
HDC doesn't do anything with the transfer case. It is a brake control, applied individually to each wheel based on feedback from the ABS sensors. It is just a different routine in the ABS system, with added throttle control.
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Lame. That said, the one and only time I used it, it was on a 300-400 yard-long, 20-25 degree gravel decline ................ with my 5,000lbs trailer in tow. No joke. I took a wrong turn while trying to get to WGI and wound up in someone's back woods (whoops!). While going down that decline, it actually felt like the axles were locking/locked up. Pretty impressive, but still lame.
Quote:
Originally Posted by Skyline
My 2004 4Runner has just exactly this button. It locks the center diff. (At the same time it disables the traction control and stability control). I find this damn useful in both deep snow and off-roading in soft conditions. It makes the car much more directionally stable in conditions where wheel slippage is likely. And traction control and stability control can deplete needed forward momentum in certain circumstances, and do more harm than good.
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This is exactly what I thought the HDC did. What the hell? I don't see the benefit to running the HDC via the ABS - I only see the negative (i.e. all what you mentioned). I drove a fully Manual Toyota HiLux in the Andes Mountains in Peru about 3 years ago - what a helluva truck! Those diff locks really got my jollies going. There's something about throwing around a fully manual HiLux (or something comparable) that makes you realize you haven't quite yet earned your man card.
