Hunt

Is there a pattern to which diesel vehicles use which files? I've tried swapping some for gas sounds and although they work at idle, low RPM and gear changes, I can't figure out which file mid gear/speed and top gear/speed uses. Driving for example the Chieftain Mk6 and comparing the sounds, I'm sure I've changed the correct files as idle, low rpm etc sound right, but mid gear/speed and top gear/speed haven't changed.