Hello everyone,

I'm trying to create 20 kg wheels. They work with the open and split differentials. But they are very unstable with viscous and even more unstable with the locked differential.

The traction control helps to make the wheels more stable.
Without traction control the wheels (or the axle?) just explode.

With the viscous differential the wheels accelerate the car while i'm not even pressing the accelerate button.
With the locked differential the car just gets reset when i'm trying to accelerate.

I don't know the solution, but I looked at the code for the differentials. Maybe the damping force is too high for lightweight wheels.

For demonstration, here is a modifeied .tuck file based on Ford Mustang (1979-1982) from PoLi.
Get the original from:
https://forum.rigsofrods.org/resources/ford-mustang-1979-1982.712/

and put the .truck file inside the 1982-Ford-Mustang-351W-PoLi.zip file (or folder if you extracted it):
1982-Ford-Mustang-MODIFIED.zip