Keep a hardworking commercial rig planted and comfortable with the Monroe Magnum Rear Suspension Shock Absorber (MPN 66451), a gas-charged rear shock built for the demands of high-mileage, severe-use class 3-6 trucks and buses. It installs as a direct-fit replacement for the listed applications, including the 2015-2026 Ford Transit-150, 2015-2026 Ford Transit-250, 2015-2026 Ford Transit-350 and Transit-350 HD, plus the 2019-2025 Coachmen Beyond, 2023-2025 Entegra Coach Expanse, 2016-2020 Winnebago Fuse and 2017 Winnebago Paseo — see the Buyer's Guide tab for the full list and engine details.
- Nitrogen gas-charged: helps maintain tire-to-road contact by reducing aeration and shock fade for quicker response and a more stable ride.
- 10-stage valving: tuned to each vehicle, with a larger 1-3/8-in. bore for more efficient damping control on most applications.
- All-weather fluid: special additives assist with temperature extremes and help reduce oil breakdown, while a 2-in. or 2-1/4-in. reserve tube holds more fluid.
- Built to last: shouldered and bonded bushing with sleeve helps protect against bushing walkout, with a PTFE-coated bearing and nitrocarburized piston rod for durability.
Designed to isolate impact-related noise, vibration and harshness under most driving conditions. Backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Frequently Asked Questions
What is the Monroe Magnum 66451?
It's a gas-charged rear suspension shock absorber built for class 3-6 commercial trucks and buses, designed to handle high-mileage and severe-use applications.
Which vehicles does this shock fit?
It's a direct-fit rear shock for applications such as the 2015-2026 Ford Transit-150/-250/-350/-350 HD, Coachmen Beyond, Entegra Coach Expanse, Winnebago Fuse and Paseo. Check the Buyer's Guide tab.
Is this a front or rear shock?
It is cataloged as a rear suspension shock absorber for the listed applications.
What are signs my shocks may need replacing?
Common signs include excessive vibration, bouncing, reduced ride control, or nose-diving during braking. Have the suspension inspected to confirm the cause before replacing.
Should I replace shocks in pairs?
This listing is for one shock. Replacing shocks as an axle pair is best practice for balanced, even ride control, though not strictly required.
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