trans problem

I have a 1995 olds achieva and lately whenever i come to a complete stop or almost stop and go to push the gas again to accelerate, the feels as if it is in neutral and then it will pop into gear very violently. Any ideas.

I have a 1995 olds achieva and lately whenever i come to a complete stop or almost stop and go to push the gas again to accelerate, the feels as if it is in neutral and then it will pop into gear very violently. Any ideas.
is it a v/6 or a 4 cylinder?