how to change rear diff fluids???

Great advice

 

its pretty straight forward you normally have 3 plugs 1 drain one fill and one level plug. start from the top and take out the fill plug first then the level plug then the drain plug. after its drained put the drain plug back in and fill until the oil starts coming out the level plug, then put your level plug back in and then put your fill plug back in and your done repeat on the next drive.

personally i would probably let a shop do it, they are probably only paying 25-50 bucks or so more than what you can get the materials for to do it yourself and then you still got 10+ gallons of used smelly gear oil to get rid of and spent half a day doing it yourself laying on the ground.