Originally Posted by Steve Weiss

It's hard to make a diagnosis without knowing more information regarding the track, tires, and rest of the setup.

With that being said, I haven't run a yokomo gear diff, but I've run the spec R gear diff extensively and I've found running closer to 1000 cst seems to be about right for most situations.

Running lighter oil can definately make the car less stable getting into corners and if that, combined with some sort of strange setup or tire issue may cause your car to get loose a few minutes into a run.

Maybe try throwing something like 1000 in the gear diff and see what happens... if it doesn't help or make any difference at all, the problem might be somewhere else in your setup.

Hope this helps!

Originally Posted by olly986

i had a similar problem due to worn down outdrives as i am not using blades on my gear diff, when power was applied, the shock from the tiny movement of the dog bones would launch the car into a spin, it pobably would not be that violent with a ball diff.