Transmission mounts, comprised of metal and rubber, support the transmission as well as cushion the rest of the vehicle from some of it's vibrations.
Since transmission mounts absorb a great deal of vibration, rough driving conditions and long spans of time can cause the rubber to substantially weaken and wear down. As a transmission mount breaks down, the vehicle will experience more of the vibrations present in the transmission. If left unchecked, severe damage could be incurred by the transmission and drivetrain.
Replacing transmission mounts will likely require the weight of the transmission itself be supported during the proceedure.
We stock and sell a wide variety of quality transmission mounts from these manufacturers: