TR690— This more substantial, much more robust device was used in heavier designs such as the Outback and Legacy. As opposed to the TR580, the chain constantly rotates in the same course, though the forward/reverse choice assembly while in the intermediate housing handles the course change. Arbitrarily gradual crawl speeds.  https://johnathancnsva.get-blogging.com/34703721/the-best-side-of-gearbox-cvt