If you need diff gears get the MT2 gears as they are much better then the Rush gears. On the Rush it is very important to set the slipper clutch properly or you will mess up diff gears and the main gear in the transmission. I have a Rush but have not run it in years. Just have TOO many toys. [X(]

Parts are only going to get harder to fine for the Rush as it has been discontinued for a while now.[]