Jeep Grand Cherokee WK2 Sturdy Polyurethane Steel Front Differential Complete Set of Bushings
Long Life, Polyurethane Steel, Front Differential Isolator Mounts - Bushings
When the stock rubber bushings get old they harden, become brittle and start to break down, allowing the front differential to move excessively. This can then cause the half axles and propeller shaft to be at extreme angles while trying to transfer power to the wheels, causing excessive wear and premature failure of these components. This may also causes a knock sounding jolt when shifting from P or R to D or vice versa as the differential rotates and slams against the chassis. 
This bushing design when used as a complete set, reduces most excessive movements of the differential and minimizes the problems that it can potentially cause.
While these mounts do reduce differential movements for excellent power transfer from the drive train to the ground, they do not contribute excessive NVH (Noise, Vibration and Harshness) to the driver inside the cabin due to the softer properties of the polyurethane compound and manufacturing technique used.
Made of high quality polyurethane material with steel sleeve, pin and arm, these polyurethane bushings will not only firm up the axle assembly and eliminate that mushy feel associated with the factory rubber bushings, but they will also have a very long service life compared to their OEM rubber counterparts, reducing future labor costs and vehicle down time.
Each bushing comes prelubricated, preassembled and ready to mount into the differential. Once installed, no further servicing is required.