Does anybody know which universities allow to transfer from their LLM programs to their JD programs without having to take the LSAT?

I kind of doubt it, but you can check with the schools you are interested in to see if this is possible.

I'd think this is not a typical thing to do, so the information about this would probably not be available on the schools' websites. You'd probably have to contact them directly.

I know for a fact that at USC if you are granted such transfer you would not have to take the LSAT. I am a current LL.M there.

Do you know if many students take advantage of this? Just curious.