1. Adjust the shock absorber settings: If your shock absorbers have adjustable settings, you can experiment with different settings to find the one that provides the best balance between handling and comfort. Typically, a softer setting will reduce vibrations.
2. Use a shock absorber isolator: A shock absorber isolator is a device that can be installed between the shock absorber and the vehicle's frame. It can help to absorb vibrations and reduce noise.
3. Check the tire pressure: Make sure your tires are inflated to the recommended pressure. Underinflated tires can cause the vehicle to ride rougher and can increase vibrations.
4. Inspect the suspension components: Check the suspension components, such as the control arms, ball joints, and tie rods, for wear or damage. Worn or damaged suspension components can cause vibrations and affect handling.
5. Consider installing a lift kit: If you have modified the shock absorbers to lift the vehicle, consider installing a lift kit that is specifically designed for your Jeep Grand Cherokee. A lift kit can help to improve handling and reduce vibrations caused by lifting the vehicle.
It's important to note that modifying the shock absorbers and suspension components can affect the vehicle's handling, stability, and safety. If you are not experienced with modifying vehicles, it's best to consult a professional for advice and assistance.