I can't help you there... The rustys have planetary diff.s, they don't get these problems.
Maybe some thread lock would help? get a second oppinion before you use this stuff in your differential though.
And I don't mean as diff grease...

ya i know on the nut that holds the screw in place
whats a good DIRT tire and a good STREET tire?????????????????i might get alumenum rims off EBAY so i can have a good set of street tires and a good pair of dirt tires

Well, for the terrain I run on, Bow-ties or anything similiar is perfect. I could easily vary for your terrain though.
As for street, only thing I have used are dirt-hawgs. Because although the are horrible for dirt,(how irronic) they are fine for street.

here are some pic of tires that cought my eyes on tower

last one

need help, i need to put bigger tires on the back of a maximum st, do you no the tires i need or rims thanks

no i have an evader