The losi diffs are just built to handle to power. I have coverted it to electric. I'm running 1/8 momba monster just 3s but stock diifs dont last very long
The drive cup for trans has to have the pins for the brake and I can't find one like that. It's 6 mm On the trans output shaft And 8 mm on the pinion. That's the shafts Diameter.Are you Talking about measuring for a dog bone.