JayTSubaru

Thanks Matt167

Thanks Bennie, but in my case the rear diff is the one that's cooked and actually making sounds even though I have already disengaged it. Am actually using FWD. Suppose my centre is 4.111:1 or 4.44:1 then what should be my rear diff ratio???

I recently bought an ex Japanese 2003 Forester. Unfortunately the previous owner changed the gearbox and failed to match it with the rear diff resulting in the diff being cooked. How can I know the ratio of the current gearbox so I can be able to find the matching rear diff?