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What Causes a Car to Break Down on the Highway?

1 Answers

OCatherine

07/29/25 5:50pm

Specific reasons for a car breaking down on the highway include transmission coasting in neutral, transmission gear grinding and jumping, and fuel pump circuit burnout. Transmission coasting in neutral: Increases friction in the shifting mechanism, damaging the transmission. When coasting in neutral with an automatic transmission, the difference between driving speed and engine speed can lead to insufficient oil pressure in the hydraulic lines, damaging the friction plates inside the automatic transmission, ultimately causing transmission failure and potentially leading to a breakdown. Transmission gear grinding and jumping: For automatic transmissions, shifting into Park without fully depressing the brake pedal. If the brake isn't fully engaged before shifting to Park and turning off the engine, it can impact the transmission gears. Over time, this shortens the transmission's lifespan. For manual transmissions, forcing a gear shift without fully depressing the clutch damages the transmission. Forced shifting encounters resistance from the friction and collision between the rapidly rotating gear teeth, causing significant damage. Fuel pump circuit burnout: Fuel pumps rely on the fuel itself for cooling. If the fuel level is too low, exposing the pump, it may overheat or even burn out the circuit. Prolonged exposure to such conditions can significantly reduce the fuel pump's lifespan.

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