They changed the fluid spec and the dif cover in '05. Your old rear end may have been shot from the old stuff. This is the first Armada rear I've heard going though and a lot of people tow much more than you on a regular basis. I'd get the new one and chaulk it up to a fluke. The new Titan rears aren't having the problems now either.scott said:Just got back from canping and my rear end started humming about 20 miles from home. Left the camper at a friends place and limped home real slow. I tow a 24' camper (4000lbs) not even close to my limit of 6500lbs. I am very unhappy with this car right now. I did the fluid upgrade about a month ago. Question is do they just replace it with the same junk or with an upgrade. If they replace it with the same junk, I have a 04 Armada for sale.
Sad thing is I just bought a 05 Titan truck.