Maybe the biggest annoyance in changing out the front and rear diff fluids is having to shorten one end of the 8mm allen wrench so that it can "fit" to access the fill holes (front diff in particular) due to tight clearances. The good new is that if you'd rather not have to get out your hack saw to shorten an allen wrench, Amazon does sell a set of metric "stubby" allen wrenches. I picked up a set and can report that the 8mm wrench was perfect for making a breeze of opening the fill holes. Check the set out at:

 

Thanks for the info, this is one item on my list of "to-do's". Just ordered a set. Gotta love Amazon Prime, free shipping and it'll be at my door in two days.