Hi all,
I have a 2002 impreza outback that makes an incredibly loud humming sound in the back while driving. It's been getting worse and I suspect it might be the rear differential. I bought it last year and not sure when PO changed the fluids on it. As a starter, i figured I'd change the rear diff fluid and see what happens - maybe there;s lots of metal shaving on the plug which might indicate some issues with the differential. What i can't seem to find online is:
1) What type of fluid I should be putting in it
2) How much ?
Do any of you have an idea for this particular model ?
Thanks,
Vlad