No you cannot put a 40 series Torque Converter on a Predator 212 without making some modifications. Because the Predator 212 comes with a 3/4″ shaft whereas the drive clutch of the 40 series Torque Converter comes with bore size 7/8″ and 1″.
However, you can make some modifications to the shaft of the engine to fit in a 40 series Torque Converter. You can put a 3/4-1″ Shaft Adapter on the engine to technically convert the engine from a 3/4″ to 1″ shaft and use a 1″ bore sized 40 series Torque converter.
If you haven’t yet bought a Torque Converter yet, buy a 30 series torque converter. They fit perfectly on a Predator 212.
Modified Predator 212
If you’ve modified your Predator 212 and are now worried that a 30 series cannot handle your engine, that is a completely understandable concern. Since the 30 series Torque Converter is rated for engines up to 8hp.
However, adding a 40 series isn’t the best solution, but a 30 series Torque converter will limit your top speed. So what is the solution?
For modified engines, you should either get a 30 series Juggernaut Torque Converters, or even better replace the original bronze spacer bushing with thicker steel spacers on a normal 30 series, this will remove the limit set by the 30 series torque converter.