A transmission mount is made up of rubber and steel. It secures the transmission of a vehicle to the chassis. The two purposes of using transmission mounts are:

• securing the engine and transmission
• absorbing road shocks and engine vibrations

A few signs of transmission mount gone bad are:

• Excessive Vibration
• Clanking or Clunking Sounds
• Chassis Flex
• Thumping
• Difficulty Cornering

A bad transmission mount can damage the other parts of the vehicle. One should never drive in such a condition and should consider towing the automobile.