To check the transmission mount, insert a large screwdriver or prybar into the space between the transmission and the crossmember and attempt to pry the transmission up; any separation of the rubber indicates that the mount is worn out. For replacement, first remove the transmission crossmember mounting bolts, then take out the through-bolt attaching the mount to the crossmember along with the two bolts securing the mount to the transmission. Installation follows the reverse order of removal, ensuring that all nuts and bolts are tightened to the specified torque.