Chrysler J platform
From Dodge Wiki
The J platform was a designation used for two Automobile platform from Chrysler Corporation in the 1980s.
The J platform was only used for Coupé, and only for a few years:
A second, unrelated, J platform, this time a variant of the Front-wheel drive K platform, arrived in 1987 with the introduction of the new Chrysler LeBaron coupe and convertible. This platform remained in production until 1995.