A metallic sound from the automatic transmission may indicate the following problems:
* Gear wear: Worn or damaged gears can cause a grinding or clanging metallic sound.
* Bearing failure: Faulty bearings can create a noise similar to a whine or hum.
*Low Transmission Fluid Level: Insufficient transmission fluid can cause insufficient lubrication and friction of metal components.
* Torque Converter Problems: The torque converter may make a metallic sound if it is damaged or worn.
*Differential faults: Differential faults can cause vibrations or noises similar to whining or humming.
* Friction lining failure: Worn or damaged friction linings may produce a grinding or metallic-slipping sound.
* Faulty solenoids: Faulty solenoids can cause pressure fluctuations and metallic noises when shifting gears.
Important: If you hear a metallic sound from the automatic transmission, do not ignore it. Automatic transmission damage can be costly to repair. Have the problem diagnosed and repaired by a qualified mechanic as soon as possible.