Gearbox limits

[Rutland]

Hi - I’m new to Audi with an ‘18 plate A6 Allroad. 
I’ve had a few cars remapped and thought I might do the same with the lovely 272ps V6 diesel. 
question - what’s the upper limit or torque that the auto box can reliably take ? I see all manner of recaps but I don’t want some spectacular dyno reading to be followed in a few miles by a shredded auto box. 
can someone give me a guid here please ?

 

many thanks