First, I want to say THANK YOU ALL for the great posts and insight!
I did, thanks to the other posts/suggestions, change the oil on my X's transfer case for my 06' -V6 4wd. I used a 10mm Allen wrench.
My problem is the rear differential!
The drain plug is also a 10mm (you may get by a 3/8) but the fill plug has a twice the size hex and it is not a square. Help!
It also looks like old silicone was used and located mid-way on the axle. Is this where it I need to fill-in and what size for the fill-plug to remove?
Thanks for your insight and expertise (in advance)!