Making Of Ford GT40 in MAYA
http://www.3dtotal.com/tutorial/maya/car_modeling_ford_gt40_vegas/ford_gt40_vegas_01.php
http://lendesign.com/FordGT40/index.html


Modeling Chevrolet Camaro Concept in Rhino
http://www.kodg-3d.com/en/tutorials/3-modeling.html

plus much more on their site (the best free car related tutorials I have seen)