yes, the force of the cylinder will push up onto the frame as it extends. But when this is happening, your control arm geometry is changing,,, the frame is going up, but the wheels are still on the ground. As the car locks up, all this force is transfered over to the upper a-arm which is connected to the wheel assembly with a ball joint. the ball joint then takes the brunt of this pressure. When the car trys to hop, its the cylinder pushing up on the frame, which in turn locks out the upper a arm connected to the wheel... The ball joints are the only connection between the control arm and wheel. So if you were to chain your cylinders to keep them from locking all the way up and keep this pressure off of the ball joint, then you wont break as many.
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