Smooth out the ride and help tame bounce and wander on your motorhome with the Monroe Magnum RV Front Suspension Shock Absorber (MPN 557031). It installs as a direct-fit replacement for the front position on the 2001-2004 Workhorse W22 — see the Buyer's Guide tab for engine-level details. Designed to handle the demands of recreational vehicles on cross-country trips and drives close to home, it combines a gas charge with full displaced valving to help control motion for improved handling and a more comfortable ride.
- 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 to adjust to road extremes, while the bore provides more consistent control (most applications).
- All-weather fluid: contains special additives to assist with extreme temperatures and help reduce oil breakdown, and a larger reserve tube holds more fluid.
- Strong and durable: shouldered and bonded bushing with sleeve helps protect against bushing walkout, with arc welds up to 360° for durability.
- Robust hydraulic lock-out helps prevent over-extension of air bags and piston top-out (when required).
Backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Interchange: HD12150160 · F347280 · 85010 · 5001334 · M85010 · 1809925 · S1978
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicle does this shock fit?
It is a direct-fit front replacement for the 2001-2004 Workhorse W22. Check the Buyer's Guide tab to confirm the correct application for your vehicle.
Is this a front or rear shock absorber?
This is a front suspension shock absorber, cataloged for the front position on the listed Workhorse W22 applications.
What does the nitrogen gas charge do?
The nitrogen gas-charge is designed to help maintain tire-to-road contact by reducing aeration and shock fade, which supports improved ride and handling.
Should I replace shocks in pairs?
This listing is for one shock. Replacing shocks as a matched pair per axle is recommended for more balanced, even ride control.
What are signs this shock may need replacing?
Excessive bounce, body wander or sway, a harsh ride, or fluid leakage from the shock body may indicate a worn shock absorber. Diagnose the cause before replacing.
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