I'm going to change the oil in the transfer case, and front and rear diffs. I looked around on here and it looks like any oil thats GL-5 will do. I'm thinking about going with 75W140 synthetic all around. Truck is driving empty most of the time. Once in a while I flat tow or move a car with a tow dolly. no plans for any towing over 4000lbs at the moment if that means anything.

Also my next question to check the rear brakes do I have to take off the diff cover to remove the axles? If so I will just do it all at once. I have not found that good of a description in the dodge service manual.

 

no the axles will come out without taking the diff cover off.

 

Can't go wrong with that oil choice.

Pull all the bolts out and whack on the end of the axle with a big hammer. The end is stuck to the hub with a gasket or RTV and may take a couple whacks to break loose. Once it drops, just pull it out. Have a pie pan or similar handy to catch the few dribbles of gear oil that will come out of the hub.