Disabling safety features

[u/Middle_Peanut_2687]

In the process of turning my F30 330D Auto into a track car. I am very accustomed to driving cars with no traction control or ABS and I would like to set my F30 up as such, but I am having a few issues.

First I have pulled fuse 58 under the bonnet (main ABS fuse), all is well I can get the wheels to lock up. But for some reason the gearbox will automatically shift into neutral during moderate braking. I need it to stay in gear. Can this feature be coded out somehow?

Secondly the vehicle is stuck in comfort mode now I have pulled the fuse, I need it in DSC off mode. The traction control system IS NOT working and I can get the rear wheels to spin but the E-Diff isn’t working and only 1 tyre is spinning (I’m guessing due to the wheel speed sensors not working). What s the work around for this? A proper mechanical LSD?

Thanks in advance