Still trying to find that annoying oil leak. I drained the gearbox and refilled with MTL. I also added a bit of florescent dye to make any leaks easier to find. When I purchased the gearbox, I had a drain plug and a top filler installed. This makes the gearbox maintenance as easy as a regular oil change.
On the otherhand, draining the diff is a pain in the arse. I used my handy Mighty-Vac to suck all the old diff oil out and refilled. I also added the florescent dye.

