Axle carrier, or steering knuckle, whatever you wanna call it, yeah:
clicky
You will also require the 3905/ t-maxx 3.3 spec
turnbuckles to use those knuckles and the new style drive shafts. Since they are telecsoping plastic shafts, they are both durable yet flexible, and no chance of bending due to being squeezed length ways- rare you ever see them damaged, mainly the universal joint wears aout and stretches over time.. a fairly long time at that.