FTCAdventure

Thanks for the reply. No, this one does not have EcoBoost. I mentioned the suspected coolant leak to the service department, and surprised that they didn't mention anything about it.

First time posting here. I have a 2020 XLT that I purchased used from dealer with 60k miles on it. Really happy about it at first, but 4 months later, it start having misfire issues at low RPM and low speed. The misfire seems to go away once I get to the highway. It also only happens when the engine is warmed up. I did the usual, such as changing spark plugs and coil boots, cleaning the GDI and throttle body, to no avail. I took the car to two mechanics and both noted the engine stutter but no code. I did notice some dried up yellow gunk in one of the cylinders. The coolant level dropped on a hot day and needed to be topped off. So I was at first suspecting an engine issue. I finally took the car to the dealer, and they just came back to me that it is a transmission issue. They are working with the service contract to cover the cost for replacing the whole transmission at $9k. Apart from the price tag... really? Transmission issue? I am hoping I can get some second opinion from you all. Thank you in advance for your suggestions.