What Causes the Transmission Noise in the Envision?

[McLondyn]

Possible causes of transmission noise in the Envision are as follows: 1. If the noise occurs in neutral gear and disappears when the clutch is depressed, it may indicate a clutch issue. The transmission can be removed to inspect the clutch. 2. If noise is present in all gears, it is usually caused by the rear bearing of the transmission output shaft. The transmission needs to be disassembled to check the bearing condition. 3. If the noise disappears in direct drive gear but persists in other gears, it suggests damage to the front bearing of the second shaft or the intermediate shaft bearing. The transmission should be opened to inspect the intermediate shaft. 4. If there is continuous high-frequency noise in a specific gear while driving, it typically indicates surface metal wear or flaking of that gear. In severe cases, the gear may need replacement. 5. If periodic noise occurs, it often means individual gear teeth are broken. The vehicle should be stopped to inspect the transmission condition. If severe, a tow truck should be called to avoid causing greater damage.