Rear axle ring gear size on 1989 ranger.

There is a metal tag on the rear cover bolt. remove that and use a wire wheel to clean it, then get your door sticker info, your vin, and goto Ford parts counter. You will see what it says. It leads your parts guy to a list of what was put in yours. Since yours is a nothin. expect lighter smaller simpler parts. But, you still need the tag, Or you have to make your own parts out of old FMX's