Well, if we gotta go though the paces. Now even inferring how difficult my life will be for trying to stop this kind of silliness before it starts.
One
must operate a mechanical device to understand how a system works. Only by driving the specific car will I be able to unlock any knowledge of said car. Gotcha.
Great, you don't spend much time on the track then most likely. I've never said that in normal operation the car is a FWD car, simply that it's not a permanent attachment. As for thinking the car has NEVER, even for a millisecond went heavy FWD biased like 80%+? You don't know that. Only datalogging will give you that ability. Just by driving? Not a chance. This is the kind of data you can datalog and is the only way to know what exactly the system is doing.
Yep, it's so rare there are aftermarket parts developed for the specific problem and numerous posts about it on the GR Yaris forums, youtube and reddit. Is it less than 10% of users? Yes. But less than 10% of users actually use their car on the track as well. No one is saying it's a common problem. Same to say the Civic Type-R doesn't heat soak for most users as well. But is it a problem at the track? Definitely. Just because your limited use case hasn't experienced it doesn't mean it's a non-issue but we see the narrow of a viewpoint you operate within - your experience only. But it was enough of an issue Toyota did something about it. They moved the exhaust pathing further away and added a vent to allow for more airflow. Again, this is just what it is. No idea why it's creating such an issue.
It literally attaches the driveshaft to the rear via a clutch pack. It functions just like the clutch you use to detach the engine from the transmission to shift the car. No amount of whatever you want to call this changes the functionality of what a clutch does. You've offered zero technical information as to how the system can work with an overdrive rear gear and have 40%+ of the torque always going to the rear without cooking the clutchpack - not even a theory. We know how the GKN Twinster works, we know how the Type-SH AWD system works, we get to see how the publicly available JTKET system this is likely based off of works. ALL the systems go heavy biased FWD to not burn up the clutchpack in order to cruise and improve gas mileage down a freeway. Honestly don't know why you're so threatened by this - it's just how these systems work and no amount of bickering changes their functionality. If you think they work differently, offer something tangible, it's not like most of these systems are new innovations. Even the roller tests show that the impulse of movement is the front wheels in sport mode. If it was 70% torque to the rear the initiation of movement would of been the entire car moving forward and not starting by spinning the front tires first. So you have technical information, comparable systems and practical testing... what else do you need? Let's hear your working theory.
I don't own a Golf, never have owned a VW product, don't like the Haldex. It's simply the fact you're fishing to try and use that as leverage for your view now even trying to infer it's a sore spot... it's all early trolling stages.
This chatting about the GR brand being awesome consists of a single self serving sentence in your entire series of posts. Cool if that's your actual intent moving forward.
www.gr-yaris.co.uk
Tell that to every GR Yaris owner whose AWD system shut off... It's not permanently attached, it's literally a clutchpack designed to vary engagement. In normal operation modes, sure, you can call it 'permanent' as it should be engaged to some degree but permanence has a different meaning to me. But I see you fall for marketing speak every single time so nothing technical will actually get through.
