Front Shock Absorber for 1995-1998 UD 1800 & More - Monroe 66639

Help keep a hard-working commercial truck steady with the Monroe shock absorber 66639, a gas-charged Magnum front unit built for Class 3-6 trucks and buses. It is a direct-fit replacement for many vehicles, including the 1987-1991 Chevrolet W6500 Tiltmaster and 1987-1991 GMC W6500 Forward. See the "Vehicles it fits" section for the full list.

This Monroe gas Magnum shock absorber is designed for the demands of high-mileage, severe-use commercial vehicles. Its gas charge is intended to give quicker response and a stable, more comfortable ride. Replacing worn-out units with Magnum shocks can help reduce excessive vibration.

• Consistent ride: All-weather fluid contains special additives that help with extreme temperatures and help reduce oil breakdown. When required, a 2-in. or 2-1/4-in. reserve tube holds more fluid.
• Handling: The 10-stage valving is tuned specifically to each vehicle and adjusts to road extremes. On most applications, a larger 1-3/8-in. bore provides more efficient damping control.
• Strong and durable: A shouldered bushing and a bonded bushing with sleeve help protect against bushing walkout, and arc welds run up to 360°. On most applications, a hydraulic lock-out helps prevent over-extension of air bags, top-out of the piston and damage to the seal assembly.
• Longer service life: On most applications, a bearing with PTFE coating reduces friction between the rod and rod guide, and it works with a nitrocarburized piston rod.

The nitrogen gas charge is designed to maintain tire-to-road contact by reducing aeration and shock fade. The shock is also designed to isolate impact-related noise, vibration and harshness under most driving conditions. Signs a shock absorber may need replacing include excessive bouncing, fluid leaking from the body, nose dive when braking and uneven tire wear. Shocks are commonly replaced in pairs on the same axle for balanced damping. This part is backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

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