Yokomo BD7 2016 Rear Diff Help

[ben5rokz]

Hi everyone,

I built the BD7 16 before christmas when I received it. I have been told countless times that the diff feels very tight compared to what it should, I am running kit 2000 oil, but it feels far less smooth/free than the others. On another diff I tried using a 0.1mm washer instead of a 0.2mm as comes with the kit and found that completely eliminates the problem, as that diff runs super smooth and feels as a 2000 diff should. I have done all the sanding of the plastic diff gears inside to make them smooth. The washer switch seems to have fixed the issue, but I dont know if there is any cons from using this fix and if there are any, a better solution would be more ideal!

I would run it as is, but the car feels very tail happy all round for the first 2-3 minutes of a run, almost coming round on itself tail happy, but it is controllable-ish. The reason I think it is the diff is because my dads car is using the washer switch (smoothing the diff) and he says he doesn't have any issues at all, but then I tend to be much more aggressive as a driver so could be just me!

Thanks all,
Ben