My recently acquired truck is rapidly approaching the 70K mile mark, and I was reading in the manual about the necessary maintenance procedures. Since I am a farmer, and I imagine sometime this summer I will cross the 72K mile mark, I want to perform some of the maintenance now while Im not too busy. I want to change the fluids in the front and rear axle, and also the transfer case. My truck has the Dana M60/248MM front axle and the Dana M80 Rear axle. Do I use any type of special 80w-90 for the rear? My book says use SAE90 for the front axle, is this correct? Any idea how much each one takes? Is there any "additives" I'm supposed to be adding to either?(seems like I remember reading somewhere on here about certain additives?) Now, with the transfer case, which fluid and how much? Dexron III Automatic transmission fluid or something else? Also, guess I was wondering if any manufacturers product will work, or do we have to use some "Dodge" stuff?
thanks,
coadman

one other thing, what about

 

I'm not certain on the tranny fluid but I'm thinking that is what it was supposed to be. As far as the rear end, I believe the factory wants a 85w140 but I think that is a bit much. I prefer to use synthetic 75w90 in my stuff, just remember you'll want an oil with the posi additive in it already. All of the synthetics I can think of off hand have it already.

Transfer Case ATF+4 5/6.5 pts
47RE ATF+4 6.5/17 qts
Rear End 85w140 6.8/10.1pts
Front End 75w90 6.3/7.3pts