As best I can tell, the old motor is presently known as a B848. The two speed equivalent is the B982. So, I placed it on order today.

I have a PoolPilot Digital, so I could run the two speed motor via the PoolPilot. But, the current motor is controlled via a timer and DPST switch. I like the simplicity of this approach, so I will likely replace the current switch with a DPDT variety, and leave the wiring as is.

I plan on running the pool in low speed, and only using the high speed for back washing, etc.

I'll update this post regarding my installation experience.