I installed the fan on the MM, and ran a pack in the hotel parking lot. It sure is sweet to just walk outside with the truck and controller and let it rip. I probably don't need the fan, but was bored so I put it on. I can always take it off again. I should have taken the pics before running in the snow
Here is a pic of the Traxxas cvd's using the HB dogbone cups. You can see that it is a little short. The bone hasn't popped out yet, but it could.
And here is the front with the Traxxas dogbone cup. It is a bit longer and holds the cvd better.
Next time I have the rear diff apart, I will change the dogbone cups to the Traxxas ones. Too bad I have to split the bulks to get the diff out.