For those who have done the phantom grip conversion, please describe how well it works. I'm debating on whether I should do this mod. I tried to install a C32 AMG diff + Quaife LSD on my Mercedes C320 Coupe, but I could not get around the TCM software issues from changing gear ratios, so I have to give up on that. I keep getting a P0730 incorrect gear ratio code and no solutions have turned up thus far. My next step would be to ship my stock diff to phantom grip for the conversion. I want to hear from others on whether the phantom grip has made a noticable difference.

I want to be able to drive my car again after not having it for 6 months.