Monroe Shocks & Struts Suspension Shock Absorber and Coil Spring Assembly P/N:58643

Help keep a truck's rear end from squatting under a trailer or a loaded bed with the Monroe Load Adjusting Rear Shock Absorber and Coil Spring Assembly, part number 58643. Sold as a pack of 2, it fits the 2004-2014 Ford F-150 and the 2006-2008 Lincoln Mark LT. See the Buyer's Guide tab for engine details.

These assemblies are built for light trucks that tow or carry varying loads. Each shock includes a heavy gauge, calibrated spring that adjusts to changing road and weight conditions, giving extra control when conditions get more demanding.

• Reduces sag under load: The calibrated coil spring is designed to reduce sag with loads up to 1,200 lbs. Capacity is limited by the suspension, tires and transmission, so see the owner's manual.
• Application-tuned valving: Full-displaced valving automatically adjusts to road extremes for ride consistency. A nitrogen gas charge helps maintain tire-to-road contact by reducing aeration and shock fade.
• Consistent ride: OE all-weather fluid contains special modifiers to handle extreme temperatures. A PTFE-banded piston helps reduce friction between the piston and the pressure tube.
• Longer service life: A self-lubricating fluid seal retains gas and reduces excessive friction against the piston rod to help limit premature wear. The heavy-duty nitrocarburized rod is built for long life.

Signs a rear shock assembly may need replacing include sagging or bottoming out under load, excessive bouncing, fluid leaks, and uneven tire wear. Diagnose the cause before replacing parts.

Interchange: SC00030