Wheel Axle Bearing (Timken Set 7): Timken part number SET7 or A7. This is the common bearing set used in Chrysler 8.75 rear axles. You can typically find these parts at a bearing supply stores online or an industrial supplier, which may have more knowledgeable staff than a typical auto parts store.
Most vehicles have a shift lock release mechanism. This is usually found near the gear shifter. Look for a small cap or cover that you can pop off with a flathead screwdriver or a similar tool.