Originally Posted by Aaron'z 2.5RS
There's a spring on the back side if the seals, are they in proper position?
Thats whats going to keep the seal and typically why a "new" one would leak...
Did you find/notice the failure point on the old one?
+1. I was going to say almost these exact words ,but it seems like u have canceled this out. When I was at the beach one day, I hit a pothole very hard and woke up the next day to find out I could hardly pop the gears in. Checked my tranny fluid and all of it was drained! So I did some researched and found out that it was the the "tension spring" on the backside of the axle seal. The broken Spring is the first thing that popped out then I opened the retainer plate. So I bought a whole new one at gilman subaru for ibbelieve 9 bucks total, and replaced it and have not looked back. And if yours is leaking like mines was...... as soon as u would put gear oil inside, and it was started it would literally ALL LEAK OUT! so maybe double checked that?, another possibility could be inputshaft seal, which is inside the transmission? Goodluck my friend I hope I gave u a little insight on my experience.