What causes the car to roll when in N gear?

1 Answers
LaFinn
07/30/25 3:22am
If the parking brake cable is loose, the car may roll, and shifting to N gear is meaningless as only P gear locks the transmission shaft. Below is additional relevant information: 1. Rolling: Refers to coasting in neutral or with the clutch disengaged. 2. Disadvantages of rolling: Coasting in N gear can damage the car. Since automatic transmission vehicles generally use pressure lubrication, where an oil pump delivers oil to areas requiring lubrication, coasting in N gear can lead to insufficient oil pressure, especially at high speeds. Inertia coasting typically occurs at high speeds when one considers utilizing it, which may prevent certain transmission components from receiving adequate lubrication, potentially causing severe damage to parts. Even at lower speeds, components still require sufficient lubrication, so coasting should be avoided in automatic transmission vehicles.
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