Vroom! Vroom! Auto sales jump as prices rise By: CNBC.com News September 04, 2013 at 10:22 AM EDT Chrysler Group reported a 12 percent gain in U.S. August auto sales while rival Ford Motor reported a 12.2 jump in total vehicle sales during the same month. Read More >> Related Stocks: Ford Motor General Motors Thomson Reuters Corporation Toyota Motor Corp Ltd Ord ADR