1993 saab 9000 cs problems on 1993 Saab 900

If I change front or back seal of sunroof would it stop leak
If I remove the tranducer thats on transmission and put back
in will the the speedometer work?
I'm getting an fluttering nosie from my exhaust,does that mean converter is clogged?

Asked by for the 1993 Saab 900