The Lexus RX 300 is a reasonably priced crossover. Designed as an economical alternative to pricier sedans, the RX 300 is a roomy and fun-to-drive sports car at heart. There are a few maintenance items that will assure a long and useful life for your RX 300. One such job is replacing the transfer case oil. Changing the transfer case oil is not difficult and can be performed in a single afternoon.
Drive the RX 300 onto a level surface, set the parking brake, and use the jack to jack the front of the car off of the ground.
Crawl underneath the engine compartment and locate the transfer case next to the car's driveshaft. On the bottom of the transfer case is the drain plug. Use the socket wrench to remove the plug.
Allow the fluid to drain into the drain pan, then replace the drain plug. On the driver's side corner of the transfer case will be the fill hole. Remove the bolt filling the hole with the socket wrench and then insert the plastic tube from the fluid pump into the hole.
Pump the manufacturer recommended amount of oil into the transfer case and then replace the filler hole bolt. Lower the car off of the jack and take it for a spin.
Wear gloves and goggles when draining the fluid as it could splash in your eyes and face.