If engine sound increases at a specific gear (especially fifth):
In 5th Gear (Overdrive Gear) , TYRE rpm increases more than the engine RPM. (example if your engine is at 1000 rpm, your tires might be at 1500rpm).
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In 5th Gear (Overdrive Gear) , TYRE rpm increases more than the engine RPM. (example if your engine is at 1000 rpm, your tires might be at 1500rpm).
