If the mounts have become hard, split, or separated from the metal backing, they must be replaced, this also can be done with the engine/transmission still in the car. To remove the front mount, unbolt the throughbolt and the nut on the front end; to install the mount, lift the engine with a hoist or a jack placed under the wooden block on the oil pan. After that, unbolt the mont and frame bracket assembly from the crossmember, place the new mount in its place, install the throughbolt and nut and tighten all the bolts to the required torque. The rear mount, first of all, require the crossmember-to-mount bolts to be taken off and then lift the transmission to drain slightly using a jack. Then, take off the mount-to-transmission bolts and the mount as well as the bolt for the output shaft-to-transmission. take a new mount and place it, drop down the transmission and make the crossmember to mount bolts aligned before final tightening where all the bolts to the specified torque.