Monroe Shocks & Struts Suspension Shock Absorber P/N:550058
Smooth out the ride and keep worn dampers in check with the Monroe Magnum Rear Suspension Shock Absorber 66440, a gas-charged unit built for the demands of high-mileage, severe-use class 3-6 vehicles. It installs as a direct-fit replacement for the listed applications, including the 2014-2025 RAM ProMaster 2500 and 2014-2025 RAM ProMaster 3500, plus a wide range of motorhome and camper-van builds on that chassis — 2014-2023 Winnebago Travato, 2020-2023 Winnebago Solis, 2020-2024 Thor Motor Coach Tellaro, 2021-2023 Roadtrek Chase, 2017-2019 Hymer Aktiv and Hymer Aktiv 2.0, 2018-2023 Fleetwood Irok, 2023-2025 Airstream Rangeline and more. See the Buyer's Guide tab for the full application and engine list.
Backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Interchange: HD12140552 · 68157782AC · 68157782AD · 68157782AE · F347086 · 3450007 · 170258 · 53301641 · 12140672
This part cross-references / interchanges with the following part numbers:
What position does this shock absorber fit?
It is cataloged as a rear suspension shock absorber for the listed applications. Check the Buyer's Guide tab to confirm the correct fitment for your vehicle.
Does this fit my RAM ProMaster?
It is listed for the 2014-2025 RAM ProMaster 2500 and 2014-2025 RAM ProMaster 3500, along with many motorhome builds on that chassis. See the Buyer's Guide tab for the full list.
What are signs my shock may need replacing?
Excessive bounce, poor ride control, bottoming out, or added vibration can be signs a worn shock may need replacing. Have the cause diagnosed, as other components can produce similar symptoms.
Is this a gas-charged shock?
Yes. It uses a nitrogen gas-charge that helps maintain tire-to-road contact by reducing aeration and shock fade for a more stable, comfortable ride.
Should I replace shocks in pairs?
This listing is for one shock. Replacing both sides on the same axle together as a matched set is recommended for even, balanced ride control.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.