Re: Identifying limited slip diff. & gear ratio?
Look for the sticker on the driver door jamb. There you will find the axle, ratio, limited slip or not, engine, transmission, color and a couple of other items not usually revealed by the VIN.
Armed with this you'll need a decoder ring found for that year's shop manual. The decoding pages are in the first section of the shop manual. The decoding info may be available elsewhere but I have never been able to locate it outside of the shop manual.
Hope this helps™,