To take out the transmission, first raise the vehicle securely on jack stands, and remove the transmission. If you find leaks, now is the time to replace the front pump seal, or O-ring, for automatic transmissions. For manual transmission cars, you will want to remove the pressure plate and clutch disc. Check or replace the clutch components and pilot bearing. When removing an engine or accessory, it is important to make alignment marks on the flywheel or drive plate and crankshaft. If the bolts' pattern is symmetric, do not rely on the marks for proper reinsertion. Then remove the bolts that clamp the flywheel or drive plate to the crankshaft. If the crankshaft turns, remove the starter and jam in the flywheel ring gear teeth a screwdriver. Take care to support the flywheel or drive plate when removing it from the crankshaft. The last bolt is removed after this, as the weight becomes supported by the instrument. Remove grease and oil from the flywheel, and check for cracks, rivet grooves, burned areas and score marks. Light score marks may be removed with emery cloth. Inspect for cracked and broken ring gear teeth; check the flywheel with a straightedge on a flat surface for warpage. Make sure to clean and inspect mating faces of flywheel or drive plate and crankshaft. Ensure to replace leaking crankshaft rear seal before refitting. During installation, the flywheel or drive plate should be placed against the crankshaft aligning the marks that were made during removal. Apply thread locking compound to the threads of the bolts prior to installation. Insert a screwdriver into the starter motor aperture to lock the flywheel or drive plate up; proceed to tighten the bolts to specified torque. The rest of the installation occurs in the reverse order of removal.