Does coasting in neutral affect the transmission?

[DelFinley]

Coasting in neutral does affect the transmission. Coasting in neutral does not necessarily save fuel; on the contrary, it may consume more fuel and could potentially damage the automatic transmission. Here are the specific details: 1. Coasting in neutral does not necessarily save fuel and may instead consume more, possibly leading to vehicle skidding: Because some vehicles stop fuel supply when the accelerator is released during acceleration, fuel-injected vehicles save fuel when coasting at high speeds with gears engaged, whereas coasting in neutral consumes more fuel. When coasting in neutral, the wheels continue to drive the turbine to stir the automatic transmission fluid at high speed, while the transmission oil pump stops working due to the gear position. All components inside the transmission will not receive any cooling, which can damage internal parts of the automatic transmission and cause faults such as vehicle skidding. 2. Coasting in neutral may damage the automatic transmission: When coasting in neutral, the difference between the vehicle's speed and the engine's speed increases friction, reduces lubrication effectiveness, and accelerates the wear of the internal friction plates in the automatic transmission.