Theres no sound for skiding and scrubbing, maybe also no roadnoise while driving in the 1066s cars. I tested with f2 and f3 but i think the f1 also miss those. Apologies if its already posted somewhere else.
Solution is here: http://isiforums.net/f/showthread.php/2111-Lack-of-Sound-FX?p=33055&viewfull=1#post33055