One problem related to transmission gear slipping has been reported for the 2010 Toyota Camry. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Toyota Camry based on all problems reported for the 2010 Camry.
In extremely cold weather (less than 20 degrees)the transmission slips when first driven in the morning after minimum 4 minutes idling. Engine rpm 3000 vehicle speed 1-2 mph. Transmission will slowly engage as engine warms up. Also engine and stability control light come on while transmission slips. Transmission will not slip on every cold day it happens whenever. In warm weather, also when the engine is warmed up there are no problems. Transmission was replaced with a rebuilt from Toyota but it still happens just a little less often. A year later December 2014 cold weather coming , I'm afraid the transmission will slip again. The local Toyota shop should be considering an electrical or computer problem.