In our 2017 Limited, we noticed over last 6-8 months a loud THUNK when we almost come to a stop and then start accelerating. First time it happened I thought somebody hit my van or I ran over something and pulled over to check! I took it into the dealer for other stuff and they diagnosed that two motor mounts were bad and need to be replaced and would account for this behavior. Seems like initially defective parts as van only has 26K miles on it. Parts have to come from Detroit so its a two day fix minimum for me here in Florida! I will post part numbers here after I get my invoice.