According to some info from
ca.motor1.com , Bruce Baumhower, president of United Auto Worked Local 12 confirmed that the regular production of the Wrangler JL will commence in November, while pre-production is scheduled to begin "much earlier".
Jeep will be shutting down it's Toledo plant in Ohio for 6 months in order to get the retooling done starting in April.
The Cherokee production will be moved to Illinois at the Belvidere factory where the assembly of the old Compass and Patriot came to a stop at the end of December.
The JK however will continue to run production until March of next year when FCA will close that are down to get production ready for the JT (Jeep Scrambler)