There is a exhast leak coming from the exhaust donut where the manifold connects to the exhast. The donuts were replaced by the trans shop but now there is a leak. I took it back to them but now it still leaks a little. How could I stop this?

i'd take it back to the shop and tell them to put another donut in it. unless of course, this has been longer than their warranty period.
the donuts are easy enough to change. if you end up doing it yourself, make sure that you tighten the bolts up evenly; don't coque( is that how you spell it or is that totally:rainbow: ) the donut or it will leak again.:smokin:

Look at the flange alignment does it look plumb? have them take it apart again and inspect the inner flange surfaces. You may not be getting a good seal even with a new donut. Also I'd inspect the manifold and the pipe area adjacent to it for cracks.:smokin: