I bought an 05 new, first time I changed oil in the dif broke the bolt of. I then removed the dif and took it apart. After removing the bolts holding it together I very carefully, using 2 1inch paint scrapers pride the two pieces apart. if anyone tries this be very carful because there is a rubber ring between the pieces for an oil seal. I did this because I didn't know any better at the time and it was my last resort. I haven't had any trouble with the rear end since. I have over 40 miles since doing the repair with no problems whatso ever. good luck if you go this route.