Oct 17, 2019
I am having the exact same problem. I am not happy considering the money I spent on these.
Once you loosen the screws on the trucks, it solves a lot of issues. I loosen them to the point of when you turn the car in your hand, the trucks move freely. I had uncoupling issues also. A drop of ca on top of the coupler in the closed position solved that problem. Atlas will fix your engine if you send it back to them.