FCA trademarked Trackhawk. The purely off road Grand Cherokee is the Trailhawk so the performance oriented GC is going to continue even with SRT going back to Dodge.
http://blog.caranddriver.com/fiat-c...wk-is-the-company-hellcatting-all-the-things/
http://blog.caranddriver.com/fiat-c...wk-is-the-company-hellcatting-all-the-things/