Ford 8H6Z-5310-A Spring - Front

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Lower the knuckle to allow room to remove the assembly, but be careful not to overextend the inner CV joint.

Lower the trailing arm slowly with the floor jack until the coil spring is extended.

Examine the shock for signs of fluid leakage. Check the piston rod for signs of pitting along its entire length, and check the shock body for signs of damage. Test the operation of the shock, while holding it in an upright position, by moving the piston through a full stroke, then through short strokes of 2 to 4 inches. In both cases, the resistance felt should be smooth and continuous. If the resistance is jerky or uneven, or if there is any visible sign of wear or damage, replacement is necessary.