[cbman]

Skywalker, I figured you have a 4-cylinder Zetec engine since the word Zetec is in the thread title, and that's why I put in my $0.02.

Anyway, you should probably just go with whatever is already on your tranny.

Its probably possible to remove the inner bearing race from your stock diff so that you can reuse the speedo gear or trigger wheel that you already have.