Afletch16

I have a 2011 s4 IE single pulley. The car seems to be slipping in the higher rpm range. This all happened after I tried launching the car in the rain and the tires didn’t want to give so my clutch burned bad. So I replaced the clutch with sachs xtend and luk flywheel. Clutch looks good when they took it out, but still having same symptoms. Tried replacing supercharger belt, same thing. It slips and then grabs again. Happens most when in 2nd gear and 3rd. I’m lost on what to try next, I was thinking maybe belt tensioner or apr single pulley belt. Thanks