I was having major problems trying to do the snow levels on hard. Finished with an 8 second lead. Try these settings -:
Brakes 9 both
ASM 10 both
TCS 5
Gear Auto settings 25
Spring Rate 15.6 both
Ride Height 140 both
Dampers all set to 3
Camber 2.0 front 1.0 rear
toe 0 both
stabiliser 2 both
downforce set to max both
LSD 10/20/10 front 10/50/20 rear
VCD 40
weight balance both set to 0
Brakes 9 both
ASM 10 both
TCS 5
Gear Auto settings 25
Spring Rate 15.6 both
Ride Height 140 both
Dampers all set to 3
Camber 2.0 front 1.0 rear
toe 0 both
stabiliser 2 both
downforce set to max both
LSD 10/20/10 front 10/50/20 rear
VCD 40
weight balance both set to 0