The models include the Dodge Ram 2500 and 3500 trucks from model years 2003 to 2008, as well as some from 2008 to 2012.
Other models include the Ram 1500 4×4 Mega Cabs and the Ram 4500 and 5500 4×4 chassis cabs from 2008 to 2012.
A series of accidents related to problems in the steering systems on the vehicles prompted the recall.
Chrysler said it was aware of seven accidents and two injuries associated with the problem.
Truck owners will be notified of the recall by mail next month with instructions for making free repair appointments.
You can find more details on the recall here: http://media.chrysler.com/newsrelease.do?id=15075&mid=1