i have had my torque converter bots fall out on me. when it was running on one bolt it only made a little clunking noise in low rpm only. it also has a rattle as if you hold a piece of steel and rattle it side to side between 2 pieces of metal about 100mm apart.
i would definately get it looked at, as it if falls apart you will be kicking yourself for the fixing cost.
or buy my T5 as a spare
