GPM MONSTER TRUCK Harden Steel #45 Front or Rear Differential Ring Gear – 1pc set #TXMS12F-R-G1-BK

Major advantages of upgrading to this part/product :
1. The material is upgraded to harden steel #45 to make it more durable and sturdy to use.
2. Reduce the gap in between gears in order for the gears to run smoother and more powerful.