Well... maybe.  I'm sure that most of the stuff will work, but there are some differences in the boards since the newer one is used with the later LCM6 board and yours is controlled by the RCMC.  I don't know that you'll have an issue with the RSL4-2131210 board, but I'd want to test it before I'd commit, I know some of the details of the serial data have changed.

My personal thought would be to consider the 6-82340 Y6b board that will have very similar sounds but will be surely fully compatible with your environment. 691RSL3091 RAILSOUNDS LITE / STEAM / 2-8-8-2 Y6b / 682340

GRJ has you covered on the technical side, but just a prototype note, these Y3's were Mallet-type articulateds rather than simple compound.  This means that the steam from the boiler was fed first to the rear set of cylinders, then exhausted to the front set, then exhausted out the stack.  This means that you would only hear the normal 4-chuff-per-revolution sounds rather than the "double chuff" of a simple articulated (both sets of cylinders exhaust directly out the stack).

I think the "double chuff" sounds cooler though, so I don't blame you at all if you swap the sound cards, but just to point out the single chuff is indeed prototypical.

If I'm totally wrong on this, somebody feel free to correct me!

@Catonsville Central Railway posted:

GRJ has you covered on the technical side, but just a prototype note, these Y3's were Mallet-type articulateds rather than simple compound.  This means that the steam from the boiler was fed first to the rear set of cylinders, then exhausted to the front set, then exhausted out the stack.  This means that you would only hear the normal 4-chuff-per-revolution sounds rather than the "double chuff" of a simple articulated (both sets of cylinders exhaust directly out the stack).

I think the "double chuff" sounds cooler though, so I don't blame you at all if you swap the sound cards, but just to point out the single chuff is indeed prototypical.

If I'm totally wrong on this, somebody feel free to correct me!

The Y6b operated in compound mode until they reached a certain speed, then switched to mallet operation.  The engineer has a simpling valve to change the operation between simple articulated operation for starting up and then switch to compound "mallet" operation for running saving steam. This gave the Y6b the sound of a simple articulated locomotive until it reached a 5-10 MPH, then it switched to compound mode and just had 4-chuffs/rev.

However the Y3 did not have that capability, so it would sound like a simple 4-chuff/rev locomotive.  But, I still think the Y6b sounds cooler.

Thanks everyone. This is what I love about this forum.
Say it isn’t so!  Lionel updated the locomotive in 2020 with the cooler but incorrect sounds?  Tough one, but I’m going to stay with the prototype sound. If I want cool, I’ll have to watch Eric’s Trains where he triple headed 2-8-8-2s with the new sounds.
Bob