For the background info go here
here is what im wondering. lets say i am screwed and have to fix this myself. i'm not exactly up on the inner workings of a rear diff. i've worked on plenty of engines and transmissions, but no differentials. lets say i decided to open up the rear end and inspect it. what do i look for? the service writer at the dealer said i had bad noises coming from my rear diff but didnt want to open it up for inspection incase they couldnt get it to go back. what exactly fails on these? it runs and drives great, its just this terrible gear noise. and its been doing it for 25K miles now.
what are my options if i have to replace this myself? i do not want to get a different gear ratio either, i like my 4.10s