I had the Lionel NYC PA & B at one time. My first TMCC engine. No sound in the A. The non powered B had sound only. I remember the B was delivered a while after the A. They weren’t sold as a set. I’m not good with remembering numbers. I don’t thing your B unit was meant to go with that engine.
I remember Marty Fitzhenry running an ABA set of these. Pretty sure the A’s had the same road number.