[Espeefan]

Nate, check out Rigid RC's metal axles, for the Tamiya trucks. They have lockers, and both driven steer and rear axles are available. They are very nice. I bought a set and the axles spin smooth and quiet. The locker actuates very smoothly too.

I do not think the Armageddon 8x4 that RC4WD sells comes with the lockers. The 8x8, however, does, but only in the rear axles.