What Causes an Automatic Transmission to Rev in D Gear Without Moving?
2 Answers
Here are the reasons why an automatic transmission may rev in D gear without moving: 1. Component failure issues: Problems with components such as the transmission shift valve, transmission solenoid valve and electronic module, or engine throttle. 2. Operational issues: Improper operations like not engaging the gear fully, not releasing or fully releasing the handbrake. 3. Inadequate maintenance: Insufficient transmission fluid leading to low internal oil pressure. 4. Brake lock-up, which prevents the wheels from moving forward and may produce noise when accelerating. Related information about automatic transmission gears is as follows: 1. Automatic transmission cars have five gears: P, R, N, D, L. P stands for Parking, R for Reverse, N for Neutral, D for Drive, and L for Low gear. 2. The L gear is often used for steep slopes, waterlogged roads, bumpy roads, speed-limited roads, congested roads, or heavy-load starts. 3. When waiting at a red light in an automatic transmission car, it is recommended to shift to Neutral. If the wait is long, you can also engage the handbrake. Keeping the car in D gear while pressing the brake at a red light is equivalent to pressing both the accelerator and brake in a manual transmission car. This situation increases fuel consumption, and prolonged use can put excessive stress on the torque converter, accelerating wear and tear on components like the torque converter.
As a car owner with years of driving experience, I've also encountered the issue of the car not moving when in D gear, which can be quite frustrating. The main reasons are problems with the automatic transmission, such as low transmission fluid levels or degraded fluid, causing internal clutch plates to slip and preventing power from reaching the wheels. It could also be due to a malfunction in the electronic control system, like faulty sensor signals making the transmission think it's in neutral. Another possibility is the parking brake not being fully released or the braking system being stuck. For safety, if this happens, don't force the car to move; instead, turn off the engine and check the dipstick to see if the fluid is within the normal range. If the fluid is dirty or low, topping up or replacing it might solve the problem. Ignoring this issue long-term can damage the transmission, leading to higher repair costs. Regularly check the fluid condition every 10,000 kilometers and replace it as needed to prevent issues.
