Bring firm, controlled damping back to your work truck with the Monroe Magnum Front Suspension Shock Absorber 66697. This gas-charged Magnum unit is a direct-fit replacement for the 1999-2020 Freightliner MT45 and MT55, built to handle the demands of high-mileage, severe-use class 3-6 vehicles. Replacing worn-out units with Magnum shocks helps reduce excessive vibration and keeps the suspension controlling the ride.
- Gas-charged control: A nitrogen gas-charge helps maintain tire-to-road contact by reducing aeration and shock fade for improved ride and handling.
- 10-stage valving: Valving tuned to each vehicle adjusts to road extremes, while the larger 1-3/8-in. bore provides more efficient damping control on most applications.
- All-weather fluid: Special additives help with extreme temperatures and reduce oil breakdown, and a 2-in. or 2-1/4-in. reserve tube holds more fluid to improve performance when required.
- Strong and durable: A shouldered bushing and bonded bushing with sleeve protect against bushing walkout, with arc welds up to 360°; a PTFE-coated bearing and nitrocarburized piston rod support longer service life on most applications.
A robust hydraulic lock-out helps prevent over-extension of air bags, piston top-out, and damage to the seal assembly on most applications, while isolating impact-related noise, vibration, and harshness under most driving conditions. Backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Interchange: HD12140657 · 1615089000 · 1615475000 · GAFP117253 · P117253 · 654958 · 5001397 · 9161069
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicles does this shock absorber fit?
It is a front suspension shock absorber for the 1999-2020 Freightliner MT45 and MT55. Check the Buyer's Guide tab to confirm fitment for your specific vehicle.
Is this a front or rear shock?
Front. The Monroe Magnum 66697 is cataloged as a front suspension shock absorber.
What is the Magnum shock built for?
It is designed for the demands of high-mileage, severe-use class 3-6 commercial trucks and buses, and is gas-charged for quicker response and a stable, more comfortable ride.
How does the gas charge help performance?
The nitrogen gas-charge helps maintain tire-to-road contact by reducing aeration and shock fade, which supports improved ride and handling.
Should I replace shocks in pairs?
Replacing the shocks on the same axle together as a matched pair is a common best practice for balanced ride control. Confirm the correct quantity for your vehicle in the Buyer's Guide.
Write a Review