TRANSFER CASE OIL TYPE AND QUANTITY. SAME F0R DIFFER4NTIAL/

Hello, In the back of the service manual, there is a list of services needed, when they should be done, and at what mileage (if mileage occurs before set amount of time). Personally, I over-maintain my vehicles because my temperature zone and driving distances call for harsh operating conditions. Look in your manual, identify the maintenance interval chart, and see what needs attention. The transfer case on some vehicles uses the same fluid as the differential, and some use a different fluid, however, I have never heard of a four wheel drive SC430. If you are wanting to change all fluids, change clutch fluid (if manual), brake fluid, power steering fluid, engine oil, transmission fluid/filter, differential oil/additives and engine coolant. If you have only rear wheel drive, you should not have a transfer case.