Hi, we finally got the bravada running, after many hours and parts later. now it's time for all of the regular maintenence. Ive started off by running some cheap oil through it to take out any possible gasoline or other random things. i replaced the air filter and ran seafoam through just about everything. cap n rotor all that good stuff has been replaced. my main question is what oils should i use for my transfer case, Automatic transmission, and differentials. I know i want to use synthetics but i would just like an idea of what brands i should be looking out for and how much of each i will need.