automatic transmission problems on 2000 Kia Spectra

my 2002 kia spectra starts and runs good but when I come to a stop sign it starts shaking and idling rough idles normal in neutral or park

Asked by for the 2000 Kia Spectra
have the motor checked first. it sounds more like a motor problem than trans problem.

I have a 2002 kia spectra gsx and I have problems with the Drive gear. It revs to 3000rpm and sometimes 4000 rpms before it will drive, what could be the problem? Every other gear works just fine..
PLEASE any suggestions!!!!