So I just picked up a 1997 Impreza outback with an automatic transmission. It needs some work and I’m trying to breath some new life into it. The rear diff is making a lot of noise and I’m looking for a used one but not having much luck. I’ve been finding conflicting information about differentials that are compatible. I’ve read the final drive for this car is 3.9 on some forums and 4.11 in others so I was hoping someone could chime in on what I should be looking for. I’m sorry in advance if this has been covered somewhere obvious. I know someone will tell me to use the search function and I have I just can’t find a concrete answer. I don’t want to buy the wrong thing.