95 5 speed transmission interchange question

I have noticed some of the JDM exchange cos. list the earlier transmissions as a correct swap while others only list 95 to 00 as acceptable. Has anyone swapped an earlier tranny into a 95 or later car? What are the changes that Suzuki/ GM made that cause some to list it as 95 or later only? Do the earlier transmissions have the same syncro problems as the 95? I will probably be getting one out af a local junk yard anyway, but any info would be appreciated!!

they all have the same bellhousing and dimensions but the newer trannys have different ratios than the earlier ones. think the 95-97 with 3 cyl and 13" tires use a 4.39 tranny. the 4 cyl can have as high as a 3.52 ratio, that is to much for a 3 cyl engine. not sure what the other ratios are but i believe if you check your door it has a tranny code you can call dealer with and find out ratio