[Hocrest]

Up to MY 98 or so will fit. The easy way to identify the change in AT's is after 98 there is an external Spin-on filter and no brake band adjustment.

Prior to that you can grab anything off of a Imp or Legacy, but you'll also need to pull a matching rear differential of a Legacy, and swap the internals with the stock SVX rear diff.

There's many posts on the subject, and I think Tom "SVXfiles" has a link in his signature with instructions for the swap...