Just take the screws out...it's not as hard as you think. If you've got it out you've really done the hard part. Once you take the screws out and pull the top off that's it. Put the oil in, close it up and tighten the screws...don't tighten too much...I twisted the head off of one of the screws on the center diff. by over tightening it...they are delecate so be carefull. Other than that it's not hard at all.