Which Transfer Case do you have?
Quadra-Trac I has the NV140.
Quadra-Trac II and Quadra-Drive II have the NV245.
The NV245 is capable of shifting into 4Low, the NV140 is single speed and can NOT.
If the bottle has "ATF+4" as the label, that means its licensed by Mopar and meets or exceeds all the Mopar ATF+4 specs, i.e. its the same thing that you buy from the Dealer. ATF+4 is synthetic, with an advanced additives package, it is superior to most ATF's you can buy in the store, only a couple of exotic synthetic oil brands offer something better.
The NV140 requires ATF+4, if you're going to substitute another ATF I would use a higher quality synthetic ATF than the recommended ATF+4 (which is also synthetic). I would NOT use any old ATF, like Dexron II, that is inferior to the recommended ATF+4. I used AMSOIL signature synthetic multi-vehicle ATF.
The NV245, some originally came with ATF+4 as the factory fill, but a TSB later changed it to Mopar NV245/247 Transfer Case Fluid. You have to get it at the Dealer. Its Mobil 242 Fluid repackaged, which is a synthetic tractor fluid. Its hard to find in anything less than 5 gallon pails. AMSOIL's makes an equivalent Tractor Fluid that you can you use.
What the FSM says.
200MM - Mopar Synthetic Gear Lubricant 75W-140
213MM - Mopar Synthetic Gear Lubricant 75W-140
NOTE: ELSD equipped axles require 118 ml (4 ounces) of Limited Slip Additive be added to the lubricant.
Recommended lubricant for the NV140 transfer case is Mopar ATF+4, Automatic Transmission Fluid.
Recommended lubricant for the NV245 transfer case is Mopar NV245/247 Transfer Case Fluid.
You don't have to buy these from the Dealer, except maybe the Mopar NV245/247 Transfer Case Fluid. Any good quality "SYNTHETIC" Gear Oil 75W-140 will be fine.
If you have Quadra-Drive II, you have the ELSD's and require the 4oz of Mopar Friction Modifier added to the axle fluid. You can find Friction Modifier at NAPA and other auto stores, it "should" work the same, but we don't know if its the exact same as the Mopar Fluid, most don't take the chance and just buy the Mopar Friction Modifier from the Dealer.