I changed the fluid in both diffs this weekend. For those that care it was a very easy job. If you can change your own oil you can change these fluids. I was very happy that I did do the job myself (especially the rear diff). As we all know at the dealer they only suction out the fluid. Well the fluid itself was actually very clean (in both diffs), the color of maple syrup. However the stuff at the bottom of the reaer diff housing was dirty. There is a magnet in the bottom of the housing (you can see it if you look carefully at my pics). It was caked with 1/4 - 5/16 thick of this dust. Suction would never get this stuff out. For those of you that will be doing this you will need a 14mm hex key for the front diff. The bottom plug is easy buy the upper fill plug does not have enough clearance to get the socket & drive on. So as you can see from my pics I used a 14mm end wrench to take it off. A ratcheting box wrench would work nicely here but I don't have any... I was surprised about the metric socket screw, must indicate country of origin...???
The most time consuming part was cleaning the old RTV. I used Permatex Ultra Grey RTV. I called Permatex Tech Support and talked at length about the best product to use. Reasons for this choice are: Withstands the highest vibration, resistance to a wide varity of petro & syth oils, no re-torque required. You put it on, torque to spec (~30ft-lbs), fill after 2 hrs (I waited overnight).