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Monroe 66878 - 60 Series Gas Magnum Shock Absorber

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SKU:
MON66878MM

Description:

The Monroe® Magnum® Rear and Front Suspension Shock Absorber for class 3-6 vehicles is gas-charged for quicker response and a stable, more comfortable ride. Designed for high mileage and severe use vehicles, it replaces worn units to help reduce excessive vibration.

This multi-position Magnum shock covers a broad range of Peterbilt, Kenworth, Western Star, Chevrolet, and GMC commercial and fleet platforms, backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

  • For Hardworking Commercial Vehicles: Designed for high mileage and severe use class 3-6 trucks and buses.
  • Consistent Ride: All-weather fluid with special additives handles extreme temperatures; 2-in. or 2-1/4-in. reserve tube holds more fluid (when required).
  • Exceptional Handling: 10-Stage valving tuned per vehicle; larger 1-3/8-in. bore for more efficient damping and a smoother ride (most applications).
  • Strong and Durable: Shouldered and bonded bushing with sleeve prevents bushing walkout; arc welds up to 360° for durability.
  • Built to Last: 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 durability and extended service life (most applications).
  • Reduced NVH: Isolates impact-related noise, vibration, and harshness under most driving conditions.
  • Improves Performance: Nitrogen gas-charge maintains tire-to-road contact by reducing aeration and shock fade.
  • Buy with Confidence: Comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

Common Fits: Peterbilt 348, 520, 579, 587 (various years, rear); Kenworth T800, W900, T680, T280, T300, T370, T400, T600A, K300, K370, K270 (various years, rear); Western Star 4700SB and 4700SF (2012-2020, rear); Chevrolet C50, C60 (1960s-1980s, front and rear); GMC C5000, C6000, C7000 (rear). Also covers Kenworth T170 (2008-2018), T270 (2008-2023), and T380 (2022-2024, rear).

Installation Manual

Installation Manual

Safety Data Sheet

Safety Data Sheet

Safety Data Sheet 2

Safety Data Sheet 2

Monroe 66878 - 60 Series Gas Magnum Shock Absorber

Description:

The Monroe® Magnum® Rear and Front Suspension Shock Absorber for class 3-6 vehicles is gas-charged for quicker response and a stable, more comfortable ride. Designed for high mileage and severe use vehicles, it replaces worn units to help reduce excessive vibration.

This multi-position Magnum shock covers a broad range of Peterbilt, Kenworth, Western Star, Chevrolet, and GMC commercial and fleet platforms, backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

  • For Hardworking Commercial Vehicles: Designed for high mileage and severe use class 3-6 trucks and buses.
  • Consistent Ride: All-weather fluid with special additives handles extreme temperatures; 2-in. or 2-1/4-in. reserve tube holds more fluid (when required).
  • Exceptional Handling: 10-Stage valving tuned per vehicle; larger 1-3/8-in. bore for more efficient damping and a smoother ride (most applications).
  • Strong and Durable: Shouldered and bonded bushing with sleeve prevents bushing walkout; arc welds up to 360° for durability.
  • Built to Last: 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 durability and extended service life (most applications).
  • Reduced NVH: Isolates impact-related noise, vibration, and harshness under most driving conditions.
  • Improves Performance: Nitrogen gas-charge maintains tire-to-road contact by reducing aeration and shock fade.
  • Buy with Confidence: Comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

Common Fits: Peterbilt 348, 520, 579, 587 (various years, rear); Kenworth T800, W900, T680, T280, T300, T370, T400, T600A, K300, K370, K270 (various years, rear); Western Star 4700SB and 4700SF (2012-2020, rear); Chevrolet C50, C60 (1960s-1980s, front and rear); GMC C5000, C6000, C7000 (rear). Also covers Kenworth T170 (2008-2018), T270 (2008-2023), and T380 (2022-2024, rear).

Installation Manual

Installation Manual

Safety Data Sheet

Safety Data Sheet

Safety Data Sheet 2

Safety Data Sheet 2

$45.90
Brand:
MONROE
Weight:
6.03 LBS
Mfr Part Number:
66878
Country of origin (CO):
US
Color:
Black
Compressed Length:
14.5625 (unece.unit.INH)
Cylinder Color:
Black
Cylinder Finish:
Painted
Dust Shield Included:
Yes
Dust Shield Material:
Metal
Extended Length:
23.9063 (unece.unit.INH)
Gas Charged:
Yes
Grade Type:
Premium
Hydraulic Lockout:
No
Includes Bump Stop:
No
Internal Rebound Bumper:
No
Lower Mount Code:
LS54
Lower Mount Type:
Loop (Eyelet) Bushing and Sleeve
Mounting Hardware Included:
No
Shock Absorber Body End Measuring Point:
Center of Loop
Shock Absorber Rod End Measuring Point:
Center of Loop
Travel Length:
9.343 (unece.unit.INH)
Upper Mount Code:
LS54
Lower Mount Code48:
LS54
Upper Mount Code74:
LS54
Lower Mount Type49:
Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL
Upper Mount Type75:
Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL