You cant go wrong with Amsoil. sign up for a personal account and you can get better pricing.
I just ordered a bunch of product yesterday, they had a 4.95$ shipping on orders over 50$
I have Redline in the diffs on the new Jeep ( got a 5 gallon pail of 75w-90 and a another 75w-140 synthetic Redline) for 75$ each shipped to my door, best deal I ever got off amazon LOL
I run the Amsoil SG in my other 02 Jeep and Durango.
I use the Amsoil SS ATF in the T-case.
per the install get the correct Allen head hex socket or allen wrench forget the size.
Loosen the fill plugs first and then the drain plugs before you drain it!
Also a outboard stern drive fill pump which threads onto a std qt bottle makes it a piece of cake to fill.
I have changed min twice alreqady to get rid of the wear metals from break in. You will be amazed at how much "pearl" will come out of the diffs a d T-case.