Keep in mind the drivetrain's max torque ability is less then what the stock flywheel torque is so with boost/increased torque you would NOT want to turn TM off but what I do is custom tune to fit the mods and ability of the drivetrain.

Being its a A4 you have it has more concerns of increased torque of abusing the A4 and forcing more internal heat, esp if the cooler was not increased to help reduce heat due to boost

This can be tuned to function well with a A4 but there is even concerns of effect to torque convertor if abusing drivetrain due to boost