Rebuilding the differentials (ecx temper/redcat everest 16)

So I got my new aluminum differentials in so I tore apart the front and rear axles and installed them.
I figured it was a good time to clean up the axles and lube them up good.

The first thing I noticed when I got the Solid Aluminum Spools was that the screws weren't in all the way. So I took them apart and put them back together with a little Loctite.

Then I packed the whole thing up with Mobil One synthetic grease.

Broke the rear differential

Redcat Racing 680010 Connect Box

So I just replace the front diff and then the rear blows out.
This time I ordered a solid aluminum spool instead of plastic.

As expected, more power = more breakage!

So I have my first real repair on my truck.

I was out banging around in the back yard doing some Rock Crawling when I noticed my truck wasn't performing as well as it should. I wasn't able to climb a particular rock face that normally I can scoot up with ease.

So I started looking around and realized that my right front wheel was kinda free wheeling.
I figured maybe I had broken an axle shaft or lost a CV pin. So I started tearing apart the front axle.
Why is it always the front one! The rear one is easy to get out, the front has all that steering linkage and crap!

Anyway, I finally determined that I had rounded out the slot in the Ring gear spool/differential where the axle goes in. Instead of being a nice little rectangular slot it was a nice little rounded hole!

Grrrr, So I looked up the part number and started shopping. Knowing that most of the parts in this car are the same as the RedCat Everest 16 so I searched around and found a replacement.

UPDATE: This is the same piece that broke. If you can afford it, I would get the Aluminum version of this (see my post "Broke the rear differential"