I don't know, but why not use the proven center diff and do a regular conversion? The Monster Truck tranny gearing may not give you the speed you might want.

I'm also curious how the VXL ESC would do, but it also limits you to 11.2 volts (3 cell LIPO). The VXL might very well push a good strong motor quite well on the 11 volts, but the Velineon motor isnt enough to move the rig with any power / speed.

Here is our effort:

http://www.rcuniverse.com/forum/m_7166520/tm.htm