Raise the vehicle and support it securely on jackstands, then remove the transmission. Now would be a good time to check and replace the transmission front pump seal. Use paint or a center-punch to make alignment marks on the driveplate and crankshaft to ensure correct alignment during reinstallation. Remove the bolts that secure the driveplate to the crankshaft; if the crankshaft turns, jam a large screwdriver or prybar through the driveplate to keep it from turning, then remove the mounting bolts and bolt plate. Pull straight back on the driveplate to detach it from the crankshaft. Be sure to align the matching paint marks, use thread locking compound on the bolt threads, and tighten them to the specified torque in a criss-cross pattern.