As the proud owner of an '08 si roadie, and also the previous owner of an '05 3.0, I can confirm the face lifted car does NOT have a drain plug on the diff, it was deleted with the 'upgrade' to lifetime fill.
Coincidentally, my diff fluid is being changed as I type this. Without the drain, it's simply a matter of sucking the old fluid out with an evacuator and then refilling it to the top.
|