I have a 99 blazer 4.3l vortec engine, 4x4, automatic trans. Recently, the transfer case cracked while driving so needs replacing. Trans should be ok, since it wasn't driven after, but unsure. Anyhow, I recently found a similar style 96 blazer auto, 4x4, 4.3l vortec. Im trying to figure out if the trans be the same or similar for this year? If not, which year blazer would have compatable trans for 99?