This weekend, I performed the first oil change in my '06 Commander. Mobil-1 5w-30 and filter. I took a look at the differentials and transfer case, sort of some advanced planning for those fluid changes to come. It looks like the differentials are fairly straight forward, but the positioning of the fill hole on the transfer case looks like it is going to be a problem getting a fluid container up there for the refill. I will be doing this with the front wheels on ramps to gain room underneath. Has anyone performed these fluid changes, and how did you do it?