2017 Cadillac ATS Powertrain & Transmission Problems

1. The transmission shudders at high speeds and at low speeds it either hesitates to shift gears or it lurches forward causing a rough shifting of gears. 2. I feel as though when I am braking and my car lurches forward, sometimes I have to brake even harder just to get the car to stop in time. This has caused me to almost hit pedestrians and/or other car. At high speeds, when the transmission shudders, I feel as though I have to slow down in order to stop the aggressive shaking, making others driving behind me have to slow down. 3. A former family mechanic has tried to resolve the transmission issue for me and he was unsuccessful in doing so. I have not taken it to a dealer or a big name mechanic. 4. The vehicle has not been inspected by insurance, police or the manufacturer. Only a family mechanic. 5. As far as I know, there was no prior indicating symptoms of the issue as I bought the car how it currently is. I was told upon purchase that the transmission has a shudder at high speeds and at hesitation of shifting gears at low speeds

TRANSMISSION SHUDDERS ON LIGHT ACCELERATION (WORST AT AROUND 50 MPH) GENERAL ACCELERATION FEELS SIMILAR TO AN ENGINE MISFIRE WITH INTERMITTENT DROPS IN POWER. SOME TIMES TRANSMISSION CAN SHIFT HARD AND HAVE A BANG, JARRING FEELING.

AT MAJOR INTERSECTION WAS AT A STOP RED LIGHT. BEGAN ACCELERATING VEHICLE STALLED AND THE LIGHT ENGINE TURNED ON, TRANSMISSION STUCK AT FIRST GEAR AND WOULD NOT ACCELERATE ABOVE 20MPH. THIS HAPPENED AS I TRIED PASSING A VEHICLE IN FRONT TO LATER MAKE A TURN. THE CAR HAS HAD THIS ISSUE SEVERAL TIMES. REPORTED TO CADILLAC THEY ASKED THAT I REPORT AS A LEMON MEANWHILE THIS IS A LEASE VEHICLE.

Transmission causes car to shudder or shake/vibrate at lower speeds and lower rpm (auto shifting) It's been like this since it was purchased. If you perform manual shifting at 2500 RPM's or higher you don't experience the same shake/vibration. Ron Craft Cadillac says it's performing as expected.