Cybercannon
New member
Re: I Know Whats going on!!!!!!!!
Thought I'd chime in even though that quote pretty much answered the original video.
Center diff locked or not, he was essentially cross-axled and center diff lock wouldn't have helped that. That would only change power front/back but not left/right. The open diff in the front sends all power to easiest (spinning) tire and the same in the rear. That's where Atrac would have / should have kicked in if he had it.
Even then it looked like he was revving way to high to give atrac a chance to do it's job. From the videos I've seen and experience with my new 4R you need to feather the pedal lightly and give the spinning wheel a few rotations before the atrac starts "lurching" or "bumping" along. I think the sensors need to see the free spinning wheel before the abs starts pulse-braking that wheel. When the brakes pulse the spinning wheel the torque in that axle still has to be expelled somewhere and it jolts the other wheel.
Atrac shouldn't dethrottle the engine, just pulse-brake the free spinning wheels. With center diff UNlocked the VSC (if that guys 4R had it) would dethrottle the engine and make rooster trails less likely. The computer is trying to regain control on what it thinks is an oversteer or understeer on a slippery turn.
With center diff Locked he could rooster trail, but still he was cross-axled, so no good. He would have needed to work the pedal correctly to let atrac work (if he had atrac).
Of course I could be full of BS, but from my OCD and research that's how I understand it.
bad4runner said:
Thought I'd chime in even though that quote pretty much answered the original video.
Center diff locked or not, he was essentially cross-axled and center diff lock wouldn't have helped that. That would only change power front/back but not left/right. The open diff in the front sends all power to easiest (spinning) tire and the same in the rear. That's where Atrac would have / should have kicked in if he had it.
Even then it looked like he was revving way to high to give atrac a chance to do it's job. From the videos I've seen and experience with my new 4R you need to feather the pedal lightly and give the spinning wheel a few rotations before the atrac starts "lurching" or "bumping" along. I think the sensors need to see the free spinning wheel before the abs starts pulse-braking that wheel. When the brakes pulse the spinning wheel the torque in that axle still has to be expelled somewhere and it jolts the other wheel.
Atrac shouldn't dethrottle the engine, just pulse-brake the free spinning wheels. With center diff UNlocked the VSC (if that guys 4R had it) would dethrottle the engine and make rooster trails less likely. The computer is trying to regain control on what it thinks is an oversteer or understeer on a slippery turn.
With center diff Locked he could rooster trail, but still he was cross-axled, so no good. He would have needed to work the pedal correctly to let atrac work (if he had atrac).
Of course I could be full of BS, but from my OCD and research that's how I understand it.
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