The Stab-o-shock reduces a little of the drivetrain oscillation. It's effect is pretty minor really.
Adding the ES roll resistor insert would be a more effective way of reducing lash.
Filled mounts a much greater effect yet.
Each with a rising trade off - road feel verses NVH.
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The shock itself is like any other type of shock.
If it is leaking or if the shocks's bound or rebound strength is bad. Then the shock is bad.
It is easy to change.
