96 is definitely NOT a one year tranny. 96-97 will interchange, and they are a one piece case.....His 98 is a two piece case with a 12 inch converter. In late 99 they changed the pump, converter, bellhousing, and input shaft. It takes a 12,1/2 inch converter. Your options are to rebuild, prolly around $800.00 with a year warranty, or used $400.00 with a 30 day warranty. Rebuild is always better, just not always in everybodys budget. If you go used, take my advice, don't buy a craigslist unless you have too. Always check local salvage yards. If you put it in and it does not move the tires, it's hard to find a guy from craigslist, but the salvage yard isn't going anywhere. car-part.com is what we use to look up parts. Most salvage yards list there inventory on there.