What causes a manual transmission car to roll backward during uphill starts?

[LeAaliyah]

Rolling backward during an uphill start (hill start) is primarily caused by improper coordination between the throttle and clutch. Here are the key explanations: 1. Hill Start: This refers to the process of starting a vehicle on an uphill slope, also known as a half-slope start. It commonly occurs on urban overpasses or mountainous roads. Manual transmission vehicles frequently encounter this issue, whereas automatic transmission vehicles do not. 2. Hill Start Technique: The operation requires coordinated use of throttle, clutch, and handbrake. Shift into first gear, gradually release the clutch pedal while gently pressing the accelerator. When the clutch reaches the semi-engaged state, quickly release the handbrake, continue gently applying throttle, and fully release the clutch pedal to transition the vehicle into normal driving mode.