Join Date: Dec 2012
Location: Tremonton, Utah
Car: 2013 Outback, 2.5i Limited w/ Moonroof
Feedback Score: 0 reviews
Not 100% sure, but I think the front and rear diff on the '15 is the same as the '13, and mine was fairly easy. The front diff is a little different from the rear though. There are just a couple important items to keep in mind.
First, make absolutely sure that you have the right drain plug. Many here have accidentally drained the CVT. On mine, it is clearly marked around the outside edge of the pan. Just take your time and look and you will be OK. The drain is on the bottom. The fill is up on the driver side close to the half axle. The second thing that's a little different on the front diff is that it has a fill overflow plug.
So, open the fill and the drain and drain the gear oil, then put the drain plug back in and torque it. Next remove the fill overflow plug. Now you fill with fresh gear oil through the fill plug until gear oil starts running out through the overflow. Wait until the gear oil running out of the overflow comes to just a small drizzle, or even just dripping, then put the overflow plug back in and torque it. Put the fill plug back in, torque it and you are done.
It is kind of tricky to fill with new oil while watching the overflow. I recommend getting a gear oil hand pump. Get one that has a plastic nozzle on the end with the little plastic springs on the side that holds it in the fill. Then you can pump the fluid from below and watch the overflow easier. I bent a piece of copper tubing and put it on the end of the pump hose. This hangs in the fill hole. I haven't used it yet, but it should make the job a lot easier when I do my 60k service.