The B platform or B-body was the name of Chrysler's midsize rear-wheel drive passenger car platform from 1962 through 1979, and the name of a later, unrelated front-wheel drive platform used by the Eagle Premier / Dodge Monaco from 1988 through 1992. The 1962-1979 platform underwent significant changes during its lifetime, but all of Chrysler's B-platform cars in a given model year shared the same chassis, with only styling differences between the Dodge and Plymouth models.