Why doesn't an automatic transmission car move when shifted to R gear without pressing the accelerator?
2 Answers
An automatic transmission car not moving when the accelerator is pressed may be due to the clutch not fully engaging; the handbrake not being released; the gear being stuck and not fully engaged; or wear and tear on the clutch disc. Automatic transmission gear positions: Generally, an automatic transmission has 6 to 7 gear positions, arranged in order from front to back. They are P (Park), R (Reverse), N (Neutral), D (Drive), and some Drive positions include D, 3, 2, and 1 gears. Some models have only three Drive positions (D, 2, 1). If equipped with a four-speed transmission, there may also be an overdrive selection switch (O/D) to engage the overdrive gear. Correct driving method for automatic transmission cars: Start the engine with the gear shift lever in the P position, and you must press the brake pedal to shift from P to other gear positions. When starting, push the gear shift lever to a lower gear position (i.e., 2 or 1, some may also have 3), and after the speed increases to a certain level, shift to D for normal driving. If cruising at high speed on a highway, you can use the O/D gear to save fuel.
I once encountered this issue - the car wouldn't move when shifting to R gear while reversing in the garage, which made me sweat with anxiety. This situation is quite common, mainly due to insufficient engine torque at idle speed being unable to propel the vehicle. When an automatic transmission vehicle is in reverse gear, the engine runs at low RPM with minimal power output, especially on flat roads or slight slopes. After checking my car, I found the handbrake was fully released with no obstructions; applying slight throttle made it move. This isn't a malfunction - many vehicles are designed this way to prevent accidental movement. However, if this persists, it might indicate transmission aging, torque converter wear, or improperly set idle speed. I recommend gently pressing the accelerator (avoid sudden bursts to prevent component damage). For safety, always check surroundings for people/obstacles before shifting gears. Regular maintenance like transmission fluid changes can prevent issues, and newer car designs are more intelligent. Overall, don't worry - just follow proper operating procedures.
