Rear of the front differential, the SVX and turbo Legacy tranny's are the same. I just did the reverse- I put an SVX transmission in my turbo Legacy wagon. The final drives are different in all three variants and the ratios are different between turbo and non-turbo Legacy's.

Here's the thread for better descriptions and differences between SVX's and turbo and non-turbo Legacy's:

http://www.subaru-svx.net/forum/show...threadid=18646

If you search, there are another thread or two discussing this further.

-Mark