NHTSA Complaint #11628386 — 2013 DODGE DART

I purchased a 2013 Dodge dart aero from best buy auto in NY and only had the car for yr and half. I have waited over a month for ASC warranty company to cover it & they refuse to after I bought extended drivetrain warranty. The check engine light came on and was told it was a transmission issue till the Dodge dealership told me that it's not covered saying the part needed is supposedly not a part in transmission but mechanics seam to think it should be ,the part is called a hydro shift actuator ,the car has a dual clutch , I've seen this recalled in cars but cannot seam find if this is a failed recall part and still have not got a clue why a part like this would be almost 6 grand to fix on a car valued at roughly 3 grand ,I still owe 9;on it. Why this part is not covered under warranty?