What could be the issue if the car automatically shifts to high gear while driving on the highway? 🤔

I have a 2012 automatic, and it often shifts to neutral when reversing, but there's no issue with driving forward. Has anyone encountered this problem? What could be the issue?

What could be the reason for a vehicle with an 8-speed automatic transmission to jerk when shifting from 3rd to 2nd gear?

What could be the reason for not being able to shift gears when the car is cold?

I have a question. Today while driving, I noticed that the gear shift lever on my automatic transmission can be shifted without pressing the button on the handle. Is this a problem?

Guys, I'm really freaking out. Just now, while driving smoothly, the D gear light (the one on the gear shift) started flashing, and the dashboard showed "Please shift to D gear first before selecting the appropriate gear." I was in a panic and didn't know whether to press the brake and shift to P gear or shift to P gear and then to D gear, and then it prompted "Speed too high to shift into D gear (or maybe P gear, I forgot)." It was terrifying, the car felt like it was in neutral and there was no power when I pressed the accelerator. I managed to park on the side using inertia, shifted back to P gear, and then to D gear, and it resumed normal driving. I want to ask you guys, what's going on here exactly? Is there a specific part that's malfunctioning?

Car enthusiasts: Sometimes when driving a small car, the D gear won't shift up. The RPM suddenly goes up, but the gear doesn't match. What could be the reason?

Has anyone experienced the car shutting off automatically while driving, and then it won't start? You can't shift gears, the car rolls by itself, and the engine warning light turns on automatically.

After turning the key, it doesn't spring back, and there is a squeaking sound when shifting gears. What could be the issue?

What could be the reasons for not being able to shift gears?

What could be the reasons for not being able to shift gears?