Transfer Case
WARNING: This page is about a different car, the 1994 Mitsubishi Precis, 1993 Mitsubishi Precis, 1992 Mitsubishi Precis, 1991 Mitsubishi Precis, and 1990 Mitsubishi Precis. However, it is still accessible from the selected car via links, so may be relevant.
On 4WD and AWD models, change transfer case fluid every 30,000 miles.