Gear Noise

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Gear noise or whine is audible from 32 - 89 km/h (20 - 55 mph) under 4 driving conditions:

Drive - Acceleration or heavy pull
Road Load - Vehicle driving load or constant speed
Float - Using enough throttle to keep the vehicle from driving the engine, the vehicle slows down gradually but the engine still pulls slightly
Coast - Throttle is closed and the vehicle is in gear

Gear noise most frequently has periods where the noise is more prominent, usually between 48 - 64 km/h (30 - 40 mph) and 80 - 85 km/h (50 - 53 mph). Gear whine is corrected by either ring and pinion gear replacement or adjustment, depending on the mileage of the gearset.