To check the transmission mount, safely lift the car and put it on jackstand in order to safely check it. Check for any chance of the transmission touching the crossmember as this will require one to replace the mount. Wedge a large prybar between the transmission and the crossmember and lift the transmission up. If the rubber portion of the mount has ende up in the separate metal plate at this moment, the mount will have to be replaced. For replacement, as before, lift the vehicle and secure it on jackstands and then remove the mount-to-crossmember nut. After that, utilization of floor jack lift the rear of the transmission, then unbolt the mount-to-transmission bolts and finally remove the mount. Last but not the least is the so called installation, which is the exact reversal of removal.