I was able to disassemble, however, the method I used probably wasn't the best option.
1. Clamped vice grips on the ratchet wheel (perpendicular)
2. Clamped the vice grips in a vice so that the ratchet wheel would not spin
3. Rapped the chain around the sprocket and used a wrench to unthread the sprocket from the ratchet wheel.
I needed to use a cheater bar to provide enough force, but it eventually came off. No damage.