I am new here, but not new to transmissions or diesel trucks. I did some research on Torotrak and it looks like they haven't been able to crack the code on getting this IVT concept into any kind of production volumes. I did see that they have made about 2500 transmissions for a lawn tractor application and it is not being well received by customers. I have found horror stories of how the transmission does what it wants, and makes a nasty whine noise that is ear piercing. I found two videos on youtube that show the IVT tractor driving around and all you hear is whine. Plus, you can see the transmission jump when the driver releases the brake.
I sure hope that Allison does their homework with this company before getting too involved with them. This drive system is lightyears away from being reliable and ready to use in a production vehicle. Just my $.02 on the topic.