Disconnect the negative battery terminal and remove the heat shield cover, exhaust pipes, and driveshaft cover if needed. Mark the rear U-joint yoke and differential pinion flange, remove the bolts and nuts, and the center bearing retaining bolts. Remove the driveshaft and plug the extension housing. Lubricate the sleeve yoke splines, remove the housing plug and insert the sleeve yoke. Raise the center bearing, install and tighten the retaining bolts. Align the marked yoke and flange, connect with nuts and bolts, and tighten. Reverse the process to finish installation.