If on inspection, the flexible mounts have become hard or are split or separated from their metal backing, they must be replaced, which can be done with the engine/transmission still in the vehicle. For front mounts, first remove the through-bolt and nut, then raise the engine slightly using a hoist and remove the mount and frame bracket assembly from the cross member. Next, install the new mount, reinstall the through-bolt and nut, and tighten all the bolts to the specified torque. For the rear mount, begin by removing the cross member to mount bolts and then raise the transmission slightly. After that, remove the mount to transmission bolts and then the mount itself. Install the new mount, lower the transmission, and align the cross member to mount bolts before tightening all the bolts to the specified torque.