Apply a small amount of grease to the inside of all drive joints so that the plastic knuckles don't melt from friction. I might improve this part of the design later on. I've done it to many units without failure. Just remove any excess plastic threads and stuff the bearing in there. The axle gearbox halves may have some uglyness in the top where the 7mm bearing goes. The ball joint needs to be able to move with suspension travel. Tighten the suspension arm clamps around the axle balls until they allow some movement, but not too tight. If you want to support my work you can use any of the Ebay or Banggood-links below before making purchases. I wanted a monster truck that actually looks like a monster truck, and not a truggy with large wheels. Fully printable monster truck with four link suspension and four wheel drive and steering with three differentials.
