What are the shifting taboos for manual-automatic transmission cars?

[HopeFitz]

The shifting taboos for manual-automatic transmission cars are: 1. Coasting in neutral (N) gear during high-speed driving or downhill: Some drivers shift to N gear to save fuel during high-speed driving or downhill slopes, causing the transmission to operate at high speeds while the engine idles. This leads to insufficient oil pump pressure and may severely damage the transmission or even cause traffic accidents. 2. Suddenly shifting to a low gear during high-speed driving: Pushing into reverse gear before the car has completely shifted from D to R gear will cause excessive clutch wear over time. 3. Keeping the car in D gear for prolonged parking: During traffic jams, many drivers keep their foot on the brake pedal while in D gear. While this is acceptable for short durations, prolonged use can cause the transmission temperature to rise, leading to fluid deterioration. For extended parking, shift to N gear and engage the parking brake.