Originally posted by jeffreylin
No problems here, although I switched to the optional steel ring gears after about a gallon.
One thing about these gears, it is an issue inherent with shaft driven cars with one-ways and gear diffs if you crash a lot. Essentially, all that energy is absorbed by the drivetrain during a crash. Unless there are belts that slip and absorb part of that energy or ball diff that allow slip, your drivetrain is gonna take the hit, and the weakest part of that drivetrain will get worn out over time.
bumpy track can do the same thing to the gears, so does very sticky surface