yep what he said.No additive for the rear. We have a locker not a limited slip, so we don't need it
The t-case calls for ATF from the factory, but a lot of guys run synthetic 5w30 motor oil and say it operates quieter and smoother than with ATF. Fill it til it's full from the fill plug, then pull out the speed sensor and add an extra quart from the top for best results
yeah something about the stock fluid in the xfer case evaporates decently quick....I just did all of this on Friday and it was pretty easy. As already said the rear takes a little less than 4 quarts and the front took a little less than 2 quarts. I used AMSOIL 75w-90 in mine. I also did my transfer case and I am glad I did. I drained less than 1 quart and it is supposed to have 2 quarts in it. I went with Amsoil low viscocity ATF in the transfer case. Get the hand pump from Amsoil also, it will make things a lot easier!!