How do you change a pinion bearing?

To change a pinion bearing, first, remove the driveshaft and differential cover to access the differential assembly. Then, use a suitable puller to remove the pinion gear and bearing from the housing. Replace the old bearing with a new one, ensuring it's properly seated, and reassemble the components, including adjusting the pinion depth and backlash as needed. Finally, refill the differential with the appropriate lubricant and check for proper operation.