J, you can easily do your differentials tonight, the front took me no longer than 20 minutes.. the rear took me almost two hours.. but about an hour and a half of that was trying to gravity feed the differential through a tube, once i gave up on the tube and just squeezed the oil from the bottle into the differential, it took like 10 minutes
you will need sockets up to 24mm, the rear diff drain plug can only be removed with a socket, a wrench wont get in there

the quick procedure...

remove the fill plug on the differential

place drain pan under drain plug

remove drain plug and let drain, you could jack up the opposite side of the vx to assist in draining if you want.

replace the drain plug (on the rear differential make sure you have the copper washer gasket)

fill the differential by cutting the tip of the bottle off, and squeezing directly into the differential, you will need 2.5 quarts for the front and a little over 3 quarts for the rear, you will know when its full when it starts to leak back out the fill hole

on the rear diff if you use mobil1 synthetic you dont need the lsd additive, if you use regular gear oil you will need the additive, add it before you add the oil in the rear diff

replace the fill plug

double check to make sure all is tightened back up

clean up