Originally posted by GFXmania
They use thin scrotch type to type around the outside bearings for bevel gear(angle one). They try to eliminate the slop of the housing for that bearing.
It is very difficult to control the contraction of the plastic and graphic once they are release from the metal mold. So far, only Japan is the leader in this field. EVO 3 idea is very good. That's why SD also uses the same type of gearbox.
That's why it is not that company can do it properly. So far, Yokomo is the best. You have to round off the edges of the gearbox like any other brands shaft car.
Once you have a smooth drivetrain and you car will also be quieter too.
GFX, with all due respect, I don't think you need to do all that work with the EVO3 gearbox.
I have replaced my gear box a few times (stripped the thread from keep opening them to check on the gears). It works just fine everytime without having to do any additional work.
My car is quiet and very free. It could be freer if I soak my bearings and do the type of thing you described in your post. I just don't think it's necessary. I don't think it makes that much difference.
My car is fast. The car is usually as fast as any in the track. The car is not the problem, it's my skills that is not up there yet. My lap times will decrease much more by practicing than to do all that extra work with the gear box.
Perhaps you are a pro level driver and that little extra top end will help your lap time. But at my skill level, it's the practice that counts.