[Spridgets] Differentials

[David Lieb]

>> Anyone know the coding on the outside of the diff's for specific read-end ratios?
>
> If you are lucky, you will find the numbers that equate to the number
> of teeth on the original ring and pinion gears. Simply divide the
> larger number by the smaller number to get the ratio. eg: 39/10 =3.90;
> 38/9=4.22; 41/11=3.73

If it is out of the casing, simply counting the teeth of the pinion
gear will also give you the info you need.
If it is closed, holding one axle from moving while rotating the other
one through two revolutions and counting the turns of the pinion
flange will also give you enough data to determine the ratio.
David L