Interesting post, but out of four tags under the hood and a couple on the door frame of my '88 I've found nothing even hinting at gears or common ratios.

As I understand it, one can count the teeth on a ring gear (pulled, say, from a junkyard - wouldn't want to pull apart my diffs just to count teeth) and determine its ratio. I don't know *what* equals *what*, but that's what I'd heard. I'd also heard that ring gears are likely stamped with the ratio on them, but again, that's hearsay...not firsthand experience. I'll let you know what I find when I have my '91 front diff in hand next week or so.