I bought the Class 20 today and I really like it. However, I find it hard to drive to any length of time due to the extremely loud, high-pitched screech when throttling down. I don't know to what extent this sound is prototypical, but in the game it's louder than the engine and louder than break squeal. Surely, in the real world, this would have been fixed on the spot with a drop of oil? I'd consider this a sound bug. The screech/squeal when throttling down should be reduced in volume by at least half. Steps to reproduce: 1. Load any scenario or service with the Class 20. 2. Throttle up to full throttle (or any position higher than "On") 3. Throttle down and observe extreme loudness of screech/squeal. I screech is so high-pitched that some people might have trouble hearing it. Maybe it went unnoticed during tests?