Here's what I used for these jobs:
-4 quarts Nissan Matic-S ATF
-1+ quarts of Valvoline Maxlife ATF for the transfer case
-1 tube of Permatex Ultra Grey RTV Silicone
-Nissan/Infiniti copper crush washer
Tools:
-Socket wrenches (you'll need a 1/2" socket wrench, or a different size with a 1/2" adapter for the transfer case drain bolt)
-10mm socket or nut driver for the fasteners on the plastic cover on top of the engine
-19mm socket for the transmission drain bolt
-10mm hex key for the transfer case fill bolt
-Funnel with narrow neck to fit in the dipstick tube
-Fluid transfer pump
-Jack and stands
-Fluid drain pan for collecting the fluid
Here's the ATF dipstick behind the engine. I removed the plastic engine cover to access it.

I used this paper towel to wipe off the ATF dipstick. The ATF had started to change to a honey color, and there were some dark wear particles in the fluid.

This is the transmission fluid pan, located behind the front wheels and steering rack. I used a 19mm socket to remove the drain bolt.

The ATF looked brown when I drained it.

Be sure to remove the copper crush washer from the drain bolt.

Here's a new crush washer I got from the Nissan dealership. I think it's the same one used for the engine oil drain bolt.

ewww... this fluid is darker and dirtier than I'd like it to be.

I used an old washer fluid bottle to collect the used ATF, and marked some measuring points on the side. I think about 3.75 quarts of fluid drained out of my transmission.

I used this funnel that has a flexible extension tube. It was the only funnel I had that could fit in the dipstick tube opening. The extension tube was a tad too long for the funnel to rest on the weatherstrip; but this wasn't anything that couldn't be solved by some ghetto rigging with duct tape (# 7,583 on the list for uses of duct tape).

The Genuine Nissan Matic-S ATF that I bought at the Nissan Dealer. (I like the illustration of the hand pouring the fluid out of the bottle molded in the plastic on top).

The new ATF is a nice, deep cherry red color. Looks kind of like cough syrup.

The pink spots on the paper towel are from the new ATF off the dipstick. You can see the difference in color between the old and new ATF in the transmission.

Now that the ATF change is done, let's head over to the transfer case.
The transfer case is located behind the transmission toward the middle of the vehicle. The fill bolt is on the back side of the transfer case on the upper right hand side. I removed this first and used a 10 mm hex key on my 1/2" socket wrench to loosen it. It was a bit tight and took a good push on the wrench to remove. But it wasn't so that tight that I needed to use a breaker or cheater bar, unlike on my other vehicle. There was also a metal washer on the fill plug, which I did not replace. At the dealerships I've gone to to purchase replacement washers, I was told the techs typically don't replace the washers on fill plugs.

The drain plug is located on the right side of the transfer case. Here, I inserted the 1/2" socket wrench square coupling directly into the plug to loosen it. There's a little gray colored strip hanging off the plug, and you'll see later what it is.

This is my fluid of choice for the transfer case. Valvoline MaxLife Dex/Merc. The only thing I don't like about the fluid is that it smells like bad body odor. I bought the fluid pump at Advance Auto Parts. It fits both quart and gallon lubricant bottles.

The transfer case fluid looked to be in much better shape than the ATF.

I cleaned the transfer case wear particles off the drain plug magnet. It's all that dark gray stuff on the paper towel. The fluid is nice and pink though.

The small strip we saw earlier on the transfer case drain plug was some extra sealant applied to it. I believe that Nissan/Infiniti requires an application of RTV on some of their fluid drain plugs.
This is the RTV I bought to help prevent fluid leaks at transfer case drain plug.

I scraped off as much of the old sealant as I could and applied a small bead of the RTV around the outer portion of the drain plug on the threaded area.

The fluid pump makes this job really easy. I pumped in a hair over 1 quart of ATF into the transfer case (I think the published capacity is 1.31 qts.). I stopped once the fluid started spilling out of the fill hole. Note: be sure that the car is level when refilling the transfer case.

Some additional notes and comments:
-I jacked up the car pretty high to make enough room under the car for me to be comfortable moving around. I have 2 pairs of 3 ton jack stands from Sears that I use for my Honda SUV, and they were raised to just about the middle of their range. I think my tires were at least 4 inches off of the floor.
-The easiest spot for me to approach both the transmission and transfer case were from the passenger side of the car, not from the front. I did not have to remove any covers to access them.
-I did not run the engine to warm up the fluids prior to draining them. I was afraid of brushing my hand, arm or shoulder on a hot exhuast part under the car. To aid the ATF draining process, I lowered the rear of the car a notch or two on the rear stands (the ATF drain bolt is towards the rear). I made the mistake of not bringing the rear back up when I opened the transfer case fill bolt, so a little bit of fluid came out of that opening. Prior to refilling the transfer case, I made sure the car was level again.
-With the ATF drain and fill, I believe I only replaced about 1/3 or so of the fluid. I drained out and refilled with 3.75 qts., and I believe the full capacity is about 11 or so qts. I know that there is a little debate about the "proper" way to do an ATF change. The FSM says to drain the pan first. Then, it says to unhook the transmission cooler line, run the car at idle, and fill the AT with new fluid while the cooler line is draining. While I could do that, I took the lazy approach. Even though it's a short time, I don't like to keep the car running in the garage. I'm not sure what method my Infiniti dealer uses, as I haven't asked them. So it's possible that they either do a simple drain and fill, or use some sort of fluid exchange machine to make it quick and easy.
-My 2008 specifies Nissan Matic-J ATF for the transfer case, but I believe it is now discontinued and not widely available. I did hear that Matic-S has superseded Matic-J, but the the Matic-S is quite expensive and is not required for the transfer case. I like the Valvoline fluid because it's compatible with Matic-J, Matic-S, and Honda Z1 ATF. So I could technically use it to top off the transmission for the EX if needed, and I could run it in my Honda's transmission as well. I may eventually use this fluid exclusively in the future for both of my cars. That way, I would only need to stock or purchase one fluid for both vehicles, and can save a few bucks as well.
-Though someone has warned me to stick with the Nissan ATF, I haven't been given any reason why. I understand that the transmission was designed to run exclusively with the Nissan Matic fluids and not a third party ATF. However, I really don't see why it's so scary to run something else that can meet the same specs. Many Honda owners used to say the same thing about using the OEM ATF for years, but to me it now looks like enough people have tried an aftermarket fluid with success. And Hondas have been traditionally known to be very sensitive to the ATF you put in them. I used the Matic-S fluid for this ATF change, but next time around I might pick something different. If for some reason I don't use the Maxlife, I'd probably go with Redline D6. Without getting into details, I prefer Redline over Amsoil.
-I bought two of the fluid transfer pumps, as I plan to use the other one for differential fluid changes in the future. While it might not matter all that much, I don't want to mix any transmission and differential fluid. For about $10 for each pump, I call it cheap insurance.
-The Infiniti FSM lists a different numbered Permatex Ultra Grey product as an acceptable alternative from the Nissan RTV. But I bought a different numbered Ultra Grey RTV because the one Nissan recommended comes in a much larger tube; I don't believe I'll really need that much in the future. And other than the tube size, I couldn't find any difference between the two permatex products.
I did find similar threads on other G forums that had a lot of the same info I posted, but I felt that we should have something posted here for our own little group. Also, while our cars underneath are essentially the same as a G, I don't think we have to go looking on their forums all the time for information such as this.
I know I my posts can get long winded sometimes, but thanks for reading through this one. I'm willing to answer any questions anyone might have about the two jobs I did.
The next things on my maintenance to-do list for the EX are the front and rear differential fluid changes, coolant replacement, and the serpentine belt change. Maybe someone else here can do these before I get to them on my EX and put up their own pics
