Basically, the proper way is to keep 差速 as loose as possible (but without slipping).
If car spins (打白鴿轉), it is not because of the 差速, but because of other steering and spring settings.
And if you play F104, it is much harder to set if not using original Tamiya Tyres. Other brand Tyres (especial foam) will make F104 spin easily as other brand front tyres (foam) usually give too much front grip.