Parking lot where cop car was
38.233550°N 122.639984°W

Parking lot where cop car was
38.233505°N 122.640052°W

American Graffiti cop car axle coming off
38.233535°N 122.640051°W

American Graffiti parking lot
38.233535°N 122.640080°W

Where the cops lost their axle to the car.

Parking lot was used in the filming. The kids bolted the axle of the police car and then drove by them and yelled at the cops.  When the cops went to chase them, their axle was torn off. 

American Graffiti (1973)

American Graffiti is a 1973 coming of age film co-written/directed by George Lucas starring Richard Dreyfuss, Ron Howard, Paul Le Mat, Harrison Ford, Charles Martin Smith, Cindy Williams, Candy Clark, Mackenzie Phillips and Wolfman Jack. Set in 1962 Modesto, California, American Graffiti is a study of the cruising and rock and roll cultures popular among the post–World War II baby boom generation. The film is a nostalgic portrait of teenage life in the early 1960s told in a series of vignettes, featuring the story of a group of teenagers and their adventures within one night.

• http://en.wikipedia.org/wiki/American Graffiti
• Gordon, W. A., 2002, The Ultimate Hollywood Tour Book, North Ridge Books, Lake Forest, CA, 272 p.