Ok guys, today i was driving arround and now i did 1000+ miles with new LOBA/SACHS setup. Everything was great and i decided to do some 0-60 hard launches and it was really really fast and no problems while changing gears on full acelleration. But i do have one problem that i'm worried about and that's the hard knock noise while changing gear from 1st to 2nd on hard acceleration,other gears seems fine with no problems!
Got any ideas?

Cheers
J.