Originally Posted by garudatwo
When did you change your trans and diff oil? Did it change anything?
I know you were asking the other guy, but I thought I'd chime in.
I swapped the tranny and diff fluid in my 05 STi around 30k with the Motul I mentioned above and noticed a VAST improvement in shifting smoothness, and a significant reduction in gear whine. I wasn't having any "problems" with the stock oil, but the Motul was still significantly better.