Running 10.'0s with a trans brake I got about 450 passes on the ring and pinion (street gears) before the ring gear would start to crack teeth 1.39-1.40 60ft. Running mid 9's with trans brake I'm getting about 75 passes (also street gears) before I start cracking teeth 1.30 60ft. I always hear it before it fully breaks the teeth off. I think it may be time for me to switch...My car weight is in my sig...