Forget the 15K thing. Good MERCON V is good for 60K in this thing, easy.

If it's 2wd, there is no diff or T-case. Think of it as a funny looking front wheel drive car. Same stuff under the hood.

I've never used any of the Shaeffer's products, but I hear a lot of good stuff about 'em. As long as they have a synthetic MERCON V, you should be good to go. I changed the wife's over to the Mobil 1 synthetic ATF, and it actually made a slight difference in shift quality. VERY smooth now.