Keep hardworking class 3-6 trucks and buses riding under control with the Monroe Shocks & Struts Magnum Suspension Shock Absorber 66957. This gas-charged shock is built for high-mileage, severe-use commercial vehicles, and it installs in the front or rear position across a wide range of applications, including the 1970-1990 Ford F-600, 1980-1990 Ford F-700 and F-800, 1991-2005 Freightliner FL60/FL70/FL80, 1988-2011 Freightliner FLD120 and many more — see the Buyer's Guide tab for the full list and to confirm your vehicle.
- Nitrogen gas-charge: Helps maintain tire-to-road contact by reducing aeration and shock fade for improved ride and handling.
- 10-stage valving: Tuned to the vehicle and paired with a larger 1-3/8 in. bore (most applications) for more efficient damping control and a smooth, consistent ride.
- All-weather fluid: Special additives assist with extreme temperatures and help reduce oil breakdown, while a 2 in. or 2-1/4 in. reserve tube holds more fluid.
- Strong and durable: Shouldered and bonded bushing with sleeve guards against bushing walkout, plus arc welds up to 360°; a PTFE-coated bearing and nitrocarburized piston rod support longer service life (most applications).
Worn shocks let commercial vehicles vibrate, wander, and ride harshly; replacing tired units with the Magnum 66957 helps restore ride control. Backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Frequently Asked Questions
What is the Monroe Magnum 66957?
It is a gas-charged Magnum suspension shock absorber (MPN 66957) built for high-mileage, severe-use class 3-6 commercial trucks and buses. It fits front or rear positions depending on the application.
Does this shock mount in the front or rear?
The catalog lists this part for both front and rear positions. Check the Buyer's Guide tab to confirm the correct position for your specific vehicle before ordering.
Which vehicles does the 66957 fit?
Applications include the 1970-1990 Ford F-600, 1980-1990 Ford F-700/F-800, 1991-2005 Freightliner FL60/FL70/FL80, and 1988-2011 Freightliner FLD120, among others. See the Buyer's Guide tab for the full list.
How is it gas-charged and why does that matter?
A nitrogen gas-charge helps maintain tire-to-road contact by reducing aeration and shock fade, which supports improved ride and handling on high-mileage commercial vehicles.
What are the signs my shocks may need replacing?
Excessive vibration, a harsh or bouncy ride, and reduced ride control can indicate worn shocks. Diagnose the cause first; if the shocks are worn, replacing them with the Magnum 66957 helps restore control.
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