[TR] Rear leaf springs

[Randall]

> lubed springs work better because they have better reaction time full
> droop
> to full compression - and vice versa - to keep the wheels in contact with
> the road.

They also rattle your teeth less.  Rusty springs have a huge amount of
'stiction' (aka static friction), which does nothing to control oscillation,
but does cause the suspension to appear solid to small deflections.  And
they also take more-or-less constant force to overcome the friction (once
they are moving); while hydraulic shocks are designed to provide increased
resistance to faster movement.

This is why friction dampers have been obsolete since the Model T ...

Randall