Ik this is a dumb thing to ask but if I'm not mistaken dosent the class 313 have a flange sound to it when it hits the switches and curves because in the game the train is dead silent and I thought I was bugging when we switched on the curves and stuff but the train dosent have no sound to it when it hits those tracks so yeah.
There's inconsistencies with each loco. Some have flange squeal, some don't. Some have another feature, others don't. If there was a checklist or more consistency, there wouldn't be this issue. There are certain things such a flange squeal that should be on every locomotive