thanks for your help suicideneil
Here is a link to the ebay roller I acquired:
http://cgi.ebay.com/ws/eBayISAPI.dll...0629&rd=1&rd=1
Sorry, I should have been more specific. The diff casings are aluminum. I am not to familiar with the maxx trucks yet.
As for the alloy casing you are talking about, are these them?
http://www.rc-monster.com/proddetail...zerdiff&cat=47
Wow they are expensive if I am going to buy two, on top of everything else I need. Maybe they can wait.
Also, I can only seem to find 51T ofna mod1 spur gears.