What is the reason for an automatic transmission car not moving when shifted to D gear?
2 Answers
Because after an automatic transmission car stalls, the engine stops rotating immediately, even if it is in D gear. The reasons for an automatic transmission car not moving when shifted to D gear are as follows: Torque converter: The torque converter shaft is seized, causing the fuel injection pump to stop working. Lubricating oil: The lubricating oil passage is blocked, leading to insufficient lubrication, which results in the planetary gear carrier being burned out. Oil pump shaft: The oil pump shaft is broken, causing the oil pump to stop working or the differential to lack oil and burn out. Transmission: The transmission oil pan is damaged, causing all the transmission oil to leak out and resulting in vehicle issues. Solenoid valve: The transmission valve body or solenoid valve is damaged and not functioning. Loose linkage: The linkage or cable between the shift control handle and the manual valve rocker arm is loose, keeping the manual valve in the neutral or parking position.
I've been driving automatic transmission cars for over a decade and have encountered many cases where the car won't move in D gear. There are usually several possibilities. The most common is when the handbrake or brakes are stuck and not fully released, preventing the car from moving, especially after parking on a slope. Then there's insufficient or overly dirty transmission fluid, where inadequate oil pressure leads to power transmission failure - often caused by long-term neglect of fluid changes or leaks. Another possibility is a faulty gear position sensor; if the car can't detect the D gear signal, it will refuse to move. When facing such issues, don't force it - try turning off the engine and restarting first. If it still won't move, you'll need to visit a shop to check oil pressure and electronic systems. Regular monthly fluid inspections can prevent such surprises, as driving safety is paramount, and delayed repairs might cause more severe transmission damage.