Hello everyone. I am new to the forum. I have a 2015 Dodge Durango. I bought it used. It drove great for about 15 months then the transmission started slipping between 6th and 7th gear. I recently had the transmission rebuilt. The vehicle was in my possession less than three hours before I had to have it towed back to the shop. The vehicle is not recognizing park or reverse but it is not registering any error codes during diagnostics. Is this an electrical, computer or transmission issue? Could the transmission shop have damaged something to cause this issue?