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Monroe 66618 - 60 Series Gas Magnum Shock Absorber

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SKU:
MON66618MM

Description:

The Monroe® Magnum® Rear Suspension Shock Absorber for class 3-6 vehicles is gas-charged for quicker response and a stable, more comfortable ride. Designed to handle the demands of high mileage and severe use vehicles, replacing worn-out units with Magnum® shocks helps reduce excessive vibration.

Purpose-built for class 3-6 commercial trucks, the Magnum delivers reliable rear suspension performance across Isuzu NPR/NPR-HD/NPR-XD/NQR/NRR, Chevrolet LCF, and GMC Forward platforms.

  • FOR HARDWORKING COMMERCIAL VEHICLES: Designed to handle high mileage and severe use class 3-6 trucks and buses.
  • CONSISTENT RIDE: All-weather fluid handles extreme temperatures; 2-in. or 2-1/4-in. reserve tube holds more fluid (when required).
  • EXCEPTIONAL HANDLING: 10-Stage valving tuned to each vehicle; larger 1-3/8-in. bore for consistent, smooth ride (most applications).
  • STRONG AND DURABLE: Shouldered and bonded bushings protect from bushing walkout; arc welds up to 360° for durability.
  • BUILT TO LAST: Robust hydraulic lock-out prevents over-extension of air bags and protects the seal assembly (most applications).
  • LONGER SERVICE LIFE: PTFE-coated bearing and nitrocarburized piston rod for long-lasting durability (most applications).
  • REDUCED NOISE, VIBRATION AND HARSHNESS: Exceptional control isolating NVH under most driving conditions.
  • IMPROVES PERFORMANCE: Nitrogen gas-charge reduces aeration and shock fade.
  • BUY WITH CONFIDENCE: Comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

Common Fits: Compatible with rear suspension on 1986-2024 Isuzu NPR, NPR-HD, and NPR-XD, 2000-2024 Isuzu NQR, 2005-2025 Isuzu NRR, 2016-2024 Chevrolet LCF 3500/4500/5500 HD and XD variants, 1988-2010 GMC W5500 Forward, and 2005-2009 Isuzu FTR.

Installation Manual

Installation Manual
Safety Data Sheet

Safety Data Sheet
Safety Data Sheet 2

Safety Data Sheet 2
Monroe 66618 - 60 Series Gas Magnum Shock Absorber

Description:

The Monroe® Magnum® Rear Suspension Shock Absorber for class 3-6 vehicles is gas-charged for quicker response and a stable, more comfortable ride. Designed to handle the demands of high mileage and severe use vehicles, replacing worn-out units with Magnum® shocks helps reduce excessive vibration.

Purpose-built for class 3-6 commercial trucks, the Magnum delivers reliable rear suspension performance across Isuzu NPR/NPR-HD/NPR-XD/NQR/NRR, Chevrolet LCF, and GMC Forward platforms.

  • FOR HARDWORKING COMMERCIAL VEHICLES: Designed to handle high mileage and severe use class 3-6 trucks and buses.
  • CONSISTENT RIDE: All-weather fluid handles extreme temperatures; 2-in. or 2-1/4-in. reserve tube holds more fluid (when required).
  • EXCEPTIONAL HANDLING: 10-Stage valving tuned to each vehicle; larger 1-3/8-in. bore for consistent, smooth ride (most applications).
  • STRONG AND DURABLE: Shouldered and bonded bushings protect from bushing walkout; arc welds up to 360° for durability.
  • BUILT TO LAST: Robust hydraulic lock-out prevents over-extension of air bags and protects the seal assembly (most applications).
  • LONGER SERVICE LIFE: PTFE-coated bearing and nitrocarburized piston rod for long-lasting durability (most applications).
  • REDUCED NOISE, VIBRATION AND HARSHNESS: Exceptional control isolating NVH under most driving conditions.
  • IMPROVES PERFORMANCE: Nitrogen gas-charge reduces aeration and shock fade.
  • BUY WITH CONFIDENCE: Comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

Common Fits: Compatible with rear suspension on 1986-2024 Isuzu NPR, NPR-HD, and NPR-XD, 2000-2024 Isuzu NQR, 2005-2025 Isuzu NRR, 2016-2024 Chevrolet LCF 3500/4500/5500 HD and XD variants, 1988-2010 GMC W5500 Forward, and 2005-2009 Isuzu FTR.

Installation Manual

Installation Manual
Safety Data Sheet

Safety Data Sheet
Safety Data Sheet 2

Safety Data Sheet 2
$51.57
Brand:
MONROE
Weight:
5.20 LBS
Mfr Part Number:
66618
Country of origin (CO):
US
Color:
Black
Compressed Length:
13.375 (unece.unit.INH)
Cylinder Color:
Black
Cylinder Finish:
Painted
Dust Shield Included:
Yes
Dust Shield Material:
Metal
Extended Length:
21.5 (unece.unit.INH)
Finish:
Painted
Gas Charged:
Yes
Grade Type:
Premium
Hydraulic Lockout:
No
Includes Bump Stop:
No
Internal Rebound Bumper:
No
Lower Mount Code:
L3
Lower Mount Type:
Loop (Eyelet) Bushing
Mounting Hardware Included:
No
Shock Absorber Body End Measuring Point:
Center of Loop
Shock Absorber Rod End Measuring Point:
Center of Loop
Travel Length:
8.125 (unece.unit.INH)
Upper Mount Code:
L3
Adjustable Damping4:
No
Foam Cell Design38:
No
Lower Mount Code48:
L3
Upper Mount Code74:
L3
Lower Mount Type49:
Loop Bushing Mount - 3/4" Bushing ID X 1.9/16" Bushing OAL
Shaft Diameter61:
16 MM
Upper Mount Type75:
Loop Bushing Mount - 3/4" Bushing ID X 1.9/16" Bushing OAL