My 2019 DCT has an issue. when engine is strained going up hills especially in Econ mode, makes a terrible sound on the left side of the engine. It isn't valves, but no one can figure out what is causing it. Doesn't loose power, just really sounds like the engine is going to explode. Dealer doesn't want to fool with it until December. Any good solid ideas. I can't even find anyone who had this happen. I've owned 10 Wings and never had an issue like this