If upon inspection the flexible mounts have become hard, 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, remove the through-bolt and nut, then raise the engine slightly using a hoist or jack with a wood block under the oil pan before removing the mount and frame bracket assembly from the cross member. Install the new mount, secure it with the through-bolt and nut, and tighten all bolts to the specified torque, ensuring the thru-bolt is installed from the rear on the right-hand side mount. For the rear mount, remove the cross member to mount bolts and raise the transmission slightly using a jack. Next, remove the mount to transmission bolts, followed by the mount itself. Install the new mount, lower the transmission, and align the cross member to mount bolts, then tighten all bolts to the specified torque.