Fill with Gear Oil

What happens here

Locate the drain plug on the side of the axle housing. Ensure it's loose enough to allow oil to flow but tight enough not to fall out. Fill the planetary assembly with 80/90 gear oil until it starts to run out of the fill hole. Use a Macnaught C16 Suction Gun to efficiently transfer the gear oil from its container into the fill hole. This tool allows for easy and mess-free filling of difficult-to-reach reservoirs. Once the oil starts to flow out of the drain plug, tighten it, and then replace the fill cap.

Goal: Lubricate the planetary gear set with fresh gear oil.