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but when the front wheel hit a bump it lifted the back wheel ready for the bump as well
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Not exactly; in fact the reverse happens it pushes the other wheel down so the height remains the same. What happened is when the front wheel is deflected up over a bump, the front pull rod compresses the front spring inside a suspension cylinder, against the front of the cylinder. This also compresses the front "volute" spring pulling the whole cylinder forwards. That action pushes the rear wheel down on the same side via the rear spring assembly and pull rod. When the rear wheel meets that bump a moment later, it does the same in reverse, keeping the car level front to rear.
Similarly with the hydralastic suspension in the mini and the later Austin hydragas systems. When a front wheel encounters a bump fluid is transferred to the corresponding rear displacer then lowers the rear wheel, hence lifting the rear, minimising pitch associated with the bump. The reverse occurs when it is a rear wheel that encounters a bump.
If you had said but when the front wheel hit a bump it lifted the back body (rather than wheel) ready for the bump as well you would have got it right.