[fredjacksonsan]

First, make a list of the problems that started AFTER the rebuild. This is the stuff that the trans shop should fix, free. Check around and see if they're a reputable shop, there are some hackers out there.

Major vibration going from 1st-2nd-3rd? Time to go back in. There may also be an alignment problem, since 4hi won't work for you consistently.

On my '97, my 2nd gear would make a little grind if I was shifting quickly, it may just be the trans. Try shifting a little more easily, see if that takes care of that issue.

Good luck, repost if you need more help.