Auto Tranny issues in 95 TA

Hi, Ive got a 95 TA Firebird with a 4 speed auto. When it shifts into 2nd gear theres a clunking sound. Sometimes it takes time for it to kick down into 2nd gear. Any help please....

I'm not sure but mine sometimes don't like to downshift back to 2nd quickly enough. Like I'm rolling a bit after going fast but don't come to a complete stop but then take off again and it's like it can't find the right gear. Don't do it all the time but more than it should.
Sorry I can't help.