S class BMW M3 traction issues

Hey guys. So I’m having massive trouble keeping the back wheels from spinning 2 plus times shifting up between 2nd to 4th gear no matter the situation (except downhill). I cannot keep this thing planted. That’s all it needs. I’m trying to do it without messing with gearing. Any ideas?

Springs: 614.7 & 602.2
Rebound: 6 & 8
Bump: 5.6 & 6.1


ALSO; Why has Turn10 not fixed the mixed up wings in the upgrade section for the BMW? (Race wing and bodykit wings are mixed up)

You need to soften your suspension!

The REAR Springs…, plus R&B reversed! Would need build to provide add’l guidance.