27/08/2026
Very common issue here with the hzj75 transfer case input gear, they wear the main shaft splines down as they have a small engagement area onto the shaft.
Here’s an example of someone attempting to resolve this issue by welding it to the spacer and then to the PTO drive gear, causing catastrophic failure when the welds let go and punching a hole through the casing.
We resolve this issue by upgrading to a modified gear that engages on a much larger area of the main shaft.