If you are running 6s LiPo batteries through your Tekno RC then you’ll certainly be happy to hear about the newly released Tekno hardened steel differential case.
The Tekno hardened steel diff is CNC machined from steel and hardened to handle the extreme punishment coming for a huge brushless motor and 6s power.
https://www.rctalk.com/tekno-hardened-steel-diff-case/