Pontiac Bonneville transmission moaning sound issue possibly related to bearing on Pontiac Bonneville

Some Pontiac Bonneville owners report experiencing a moaning sound in the transmission that may be linked to bearing problems. This noise could indicate a failing input shaft bearing, which generates a whining sound as it deteriorates. Additionally, some owners find that a bad wheel bearing can create similar noises that seem to emanate from the transmission, leading to confusion about the source of the sound. Symptoms of a bad wheel bearing include grinding or humming noises, knocking or clunking sounds when cornering, and uneven tire wear. Furthermore, a roaring noise that increases with vehicle speed is often noted, particularly between 15 and 50 MPH. To diagnose these issues, some owners recommend raising the front wheels and checking for roughness when spinning each wheel, as a noticeable difference may suggest bearing problems. It is advisable for owners experiencing these symptoms to have both the input shaft bearing and wheel bearings inspected by a qualified mechanic for accurate diagnosis and resolution.