Personally, I run AMSOIL. However, if you're looking for a quality DINO, Shell Rotella T 15w-40 has always served me well. Just avoid Fram filters. I've taken off several where the filter media was loose inside!
I use it in the transmission of my Jeep that sees a lot of offroad crawling and some towing. Works great. Also use it in front and rear diff in the Jeep. Plan on changing front and rear diff to RP in the Rangie as well.
As for the motor oil, have been running RP in the Jag for the past few years, no complaints other than the freaking price.