ToyotaPartsDeal.com offers the wholesale prices for genuine 1991 Toyota 4Runner 2 Wheel Drive parts. Parts like Rear Axle Housing & Differential are shipped directly from authorized Toyota dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.4L, 6 Cyl 3.0L. Trim: DLX, SR5, STD.