How do you change a rear main seal on a 7.3 liter power stroke?

To change the rear main seal on a 7.3-liter Power Stroke engine, first, you need to remove the transmission and flywheel to access the rear of the engine. Once exposed, carefully remove the old rear main seal from the block and clean the sealing surface. Install the new seal by gently tapping it into place, ensuring it's seated evenly. Finally, reassemble the flywheel and transmission, ensuring all components are secured properly.