Section 2 (Drive Axle Ratio Identification): Identification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1986 Plymouth Voyager, 1986 Dodge Ramcharger, 1986 Dodge Ram Wagon, 1986 Dodge Ram Van, and 1986 Dodge Pickup. However, it is still accessible from the selected car via links, so may be relevant.
A metal tag is attached to one of the rear axle housing cover bolts. Tag gives number of teeth for ring gear and pinion gear. To obtain gear ratio, divide larger number by smaller number.