Hi All Been getting a lot of wheel spin under hard acceleration on my S1. I had it on some grass the other day and the rears were not spinning at all. the car jolts/shakes quite a lot when the front wheels start spinning even with ESC fully off. I have been told it could either be: Gen 5 Haldex coupler failure Haldex Clutch plates worn CV joints broken. Anyone help with this issue please.