To fully convert a DNX408 to a DEX408 you are looking at over $350USD worth of parts. A cheaper option would be to buy an electric conversion kit such as
http://www.redstarhobbies.com/produc...rsion-kit.html or
http://www.rc-monster.com/proddetail...rod=rcmdnx408e.
But here is a list of parts you'll need otherwise, excluding screws
TD310204
TD310205
TD310207
TD310267
TD320083
TD320085
TD320086
TD320087
TD320088
TD320089
TD320090
TD320092
TD320093
TD320135
TD320140
TD330404
TD340061
TD340062
TD340063
TD406001
TD601005 (Center Diff Bearings)
TD480009
And here is the manual
http://www.team-durango.com/pdf/manu...n%20Manual.pdf