with no 2nd and no 4th, does it have reverse? that would be a sign of a bad sunshell..
2nd and 4th do share a band appied by the servo on the passenger side of the case.
if ur planning on doing any of this yourself, 1st get a book., second, make sure u have a trans of proper year, and 3rd take pics or record on video how u take it apart, could be helpfull on re-assembly..
best choice, take it to someone who does it on a daily basis at a trans shop.
at least u get a warranty!