I remember these engines, from 1990, I believe, the 18221 with Railsounds II, and Liontech Command Reverse Unit, which was what they called the early TMCC. 18222 was conventional. I recall that Classic Toy Trains did a long term review of these after having had and run them for about a year, and the review was very positive. Apparently very good and reliable runners (assuming the oil & grease are OK, apparently )
These engines are the last time Lionel got the Rio Grande orange paint color correct!!! Nothing they've made since has been right!