Shifting Clunk/Bang under full load

[J-Doggz]

Hi All, Stage 2 with a single mass conversion flywheel. I notice a loud bang / clunk from the 1st to 2nd gear change under full acceleration... it only happens for example I’m rolling slowly in 1st then apply full throttle then change to 2nd and apply throttle and I get the clunk sound. I have not tested this traction off, I was wondering if it’s normal? Or just traction etc or possibly car just needs upgraded mounts

 

[David-AKL]

It's probably the traction control. Makes a terrible racket when it kicks in. Had this happen on my previous A1 and thought something had broken. Even stopped to have a look and everything looked fine.