Like most (new) other DLCs, this locomotive also has a sound problem. It's a shame that the newer locos have such sound issues. Video: Still, the new sounds are very good and i'm happy that they have been improved. Unfortunately, the Sound issue destroys the gaming experience a bit.
That issue is for all consoles and existed since the release of TSW2, bad looped sounds on everything.
That is mainly or basically only compression artefacts. Yes, it is bad. I, as the one who made the sound for this particular loco, can't do anything against it. No idea who to solve this general XBox problem. But DTG already said they have a potential solution for it but it would be quite risky to just apply it. So i guess there will be some testing before and at some point this problem will disappear. As always: be patient