While it lacks any instructions, the install was fairly simple. I did remove the grub screw pins to apply threadlock. They already had threadlock, but that's not easy to see until you remove them. I wasn't sure where to place the included shims. When I tried using them on the supplied shaft, it caused binding, so I removed them, then it spun nice and smooth.
I'm using this with a stock plastic diff gear vs the hot racing steel gear in a brushless jato conversion. It's held up so far to 2S with the vxl-3s/3500 velineon system. I also installed traxxas cvd's at the same time as I'm pretty sure the stock plastic sliders wouldn't hold up to the task. Considering the OEM single speed conversion lasted 5 minutes before all the teeth stripped off the main gears, this was totally worth the price.
I’d pass and wouldn’t recommend. A couple of the teeth on the main gear were binding and crunchy. It would catch in the same spot every revolution. There’s no instructions on where to put the included shims so I tried just about every possible combo with no luck. I had the Traxxas single speed gears too and dropped the Traxxas main + diff gear in while still having the HR metal input gear in and this eliminated any binding so that reinforced the HR main gear is the one that’s crunchy. I ended up putting the Traxxas plastic main + diff gear and the HR metal input gear in….