With the front and rear LSD's, this thing will probably be as predictable as a 4WD system with LSD's I'm hoping. I was talking to @Jeonsa about it yesterday, but if the GRC is delivered pretty early in winter, I'll be taking it right to Lime Rock's winter autocross and I'll see how it does
GR-FOUR AWD System Discussion
So I think many of us would not be here if the GRC was FWD, or perhaps even if it was FWD-based AWD like the Corolla Cross (FWD until slip detected)
So let’s talk about the pretty trick GR-FOUR All Wheel Drive system
This video does a pretty good job of explaining how it works , as does this forum post (these are GR Yaris specific, but should be essentially the same)
i look forward to seeing how it performs in snow/ice compared to benchmark Audi Quattro and Subaru AWD systems. (Optional) TorSen Limited slip rear AND front differentials are pretty trick and certainly help keep the torque at the tires with grip. Interestingly though…my understanding is that since there is technically no center differential it acts more like a “four wheel drive” with a traditional transfer case and torque split is “fixed” (60/40, 50/50, or 30/70 depending on mode) and doesn’t react to changes in grip (torque or wheel speed) like an Audi TorSen center diff or Subaru center Viscous Coupling. I would expect this to result in highly responsive yet predictable drivetrain response in the snow, though perhaps be slightly slower acceleration on slippery surface than if it had a TorSen center diff?
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So let’s talk about the pretty trick GR-FOUR All Wheel Drive system
This video does a pretty good job of explaining how it works , as does this forum post (these are GR Yaris specific, but should be essentially the same)
i look forward to seeing how it performs in snow/ice compared to benchmark Audi Quattro and Subaru AWD systems. (Optional) TorSen Limited slip rear AND front differentials are pretty trick and certainly help keep the torque at the tires with grip. Interestingly though…my understanding is that since there is technically no center differential it acts more like a “four wheel drive” with a traditional transfer case and torque split is “fixed” (60/40, 50/50, or 30/70 depending on mode) and doesn’t react to changes in grip (torque or wheel speed) like an Audi TorSen center diff or Subaru center Viscous Coupling. I would expect this to result in highly responsive yet predictable drivetrain response in the snow, though perhaps be slightly slower acceleration on slippery surface than if it had a TorSen center diff?
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1 - 20 of 201 Posts
