Are you doing the work yourself? There's no reason not to start the engine with belt off and observe/listen for noises or imbalance.
Can you tell if there are wrench marks on the variator nut or clutch nut? If so, previous owner had been messing with it and maybe did something incorrect.
Since you're in there that far anyway, you'll have the variator off, right, so look over all parts --rollers, etc. No lubricant should be used in the variator.
Anyway, with a belt breakage, there's prob gonna be black melted rubber all over the variator and clutch pulley faces which you'll want to clean off.
Edit: Whoops, I think I answered two different posts as though they were the same poster.