Help keep a hardworking truck riding steady with the Monroe Magnum 66656, a gas-charged Monroe shock absorber for the rear suspension of high-mileage, severe-use commercial vehicles. It is a direct-fit replacement for the 1989-2005 Mack CH. See the "Vehicles it fits" section for engine-level details. The gas charge gives quicker response and a stable, more comfortable ride. Replacing worn-out units with Magnum shocks is intended to help reduce excessive vibration.
- Consistent ride: All-weather fluid with special additives helps the shock handle extreme temperatures and helps reduce oil breakdown. On most applications, a larger 2-3/8-in. reserve tube holds more fluid.
- Handling control: The 10-stage valving is tuned specifically to each vehicle. On most applications, a larger 1-3/4-in. bore provides more efficient damping control.
- Strong and durable: A shouldered bushing and a bonded bushing with sleeve help guard against bushing walkout. Arc welds run up to 360°.
- Rod and guide: On most applications, a bearing with PTFE coating reduces friction between the rod and the rod guide. It is paired with a nitrocarburized piston rod.
On most applications, a robust hydraulic lock-out is designed to prevent over-extension of air bags and top-out of the piston, and to avert damage to the seal assembly. The nitrogen gas charge helps maintain tire-to-road contact by reducing aeration and shock fade. Signs a rear shock may need replacing include fluid leaking from the body, excessive bounce or sway, and a rougher ride. The shock is backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Interchange: A83110 · HD12140565 · 44183110 · F344357 · 83110 · 9161029 · SA66656 · 572414 · AMS660211 · 14QK413M4 · 25624341 · 660211MT · M83110 · 57366656 · SA3110
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
A83110, HD12140565, 44183110, F344357, 83110, 9161029, SA66656, 572414, AMS660211, 14QK413M4, 25624341, 660211MT, M83110, 66656, 57366656, SA3110
Frequently Asked Questions
Does the Monroe 66656 fit my 1989-2005 Mack CH?
It is listed for the 1989-2005 Mack CH. Check the "Vehicles it fits" section for the full application details before ordering.
Is this a Monroe gas Magnum shock absorber?
Yes. The 66656 is part of Monroe's Magnum line. It is nitrogen gas-charged for quicker response and to help reduce aeration and shock fade.
Is the 66656 a Monroe rear shock absorber?
Yes. It is cataloged for the rear suspension position on the listed applications.
What are signs my shocks may need replacing?
Common signs include fluid leaking from the shock body, excessive bouncing or sway, added vibration, and uneven tire wear. Other suspension parts can cause similar symptoms, so diagnose the cause before replacing.
What warranty comes with this shock?
Monroe backs Magnum shocks with its 90-day Risk Free Ride Offer and a Limited Commercial Warranty.
