Monroe 66878 | Suspension Shock Absorber

Part Number
66878
Magnum Shock Absorber

Fits what vehicles: 1960-1962 Chevrolet C50, 1960-1962 Chevrolet C60, 1960-1961 Chevrolet C70, 1968-1989 Chevrolet C50, 1968-1989 Chevrolet C60, 1979-1989 Chevrolet C70, 1980-1989 GMC C5000, 1980-1989 GMC C6000, 1980-1989 GMC C7000, 1981-2022 Kenworth W900, 1986-2008 Kenworth T600A, 1987-1989 Chevrolet S7, 1987-2022 Kenworth T800, 1993-2005 Kenworth K300, 1995-2008 Kenworth T300, 1995-2005 Peterbilt 330, 2007-2020 Peterbilt 330, 2007 Peterbilt 220, 2008-2018 Kenworth T170, 2008-2022 Kenworth T270, 2008-2015 Peterbilt 210, 2008-2018 Peterbilt 389, 2010 Peterbilt 220, 2010-2020 Kenworth T400, 2010-2018 Peterbilt 348, 2013-2020 Peterbilt 220, 2011-2018 Peterbilt 337, 2011-2018 Peterbilt 587, 2012-2020 Western Star 4700SB, 2012-2020 Western Star 4700SF, 2013-2022 Kenworth K270, 2013-2022 Kenworth K370, 2013-2020 Kenworth T680, 2013-2020 Peterbilt 579, 2014-2023 Kenworth T880, 2016-2022 Kenworth T370, 2017-2020 Peterbilt 520
Special Price $45.06 Regular Price $53.01
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In stock
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Estimated Ship Date: 1 Business Day or Less

Description


Monroe Magnum 66878 Suspension Shock Absorber

The Monroe Magnum 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, replace worn-out units with Magnum shocks to help reduce excessive vibration.


Features


  • FOR HARDWORKING COMMERCIAL VEHICLES -á-á-- Designed to handle the demands of high mileage and severe use class 3-6 trucks and buses
  • CONSISTENT RIDE -- All-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown while 2-in. or 2-1/4-in. reserve tube holds more fluid to improve performance (when required)
  • EXCEPTIONAL HANDLING -- 10-Stage valving, tuned specifically to each vehicle, adjusts to road extremes while the larger 1-3/8-in. bore provides more efficient damping control to provide consistency and a smooth ride (most applications)
  • STRONG AND DURABLE -- Shouldered bushing and bonded bushing with sleeve protects from bushing walkout for improved quality; arc welds up to 360-¦ for durability
  • BUILT TO LAST -- Robust hydraulic lock-out prevents over extension of air bags, top-out of the piston and averts damage to seal assembly (on most applications)
  • LONGER SERVICE LIFE -- Bearing with PTFE coating reduces friction between rod and rod guide combined with nitrocarburized piston rod provides durability and longer service life (most applications)
  • REDUCED NOISE, VIBRATION AND HARSHNESS -- Delivers exceptional control and isolates impact-related noise, vibration, and harshness under most driving conditions
  • IMPROVES PERFORMANCE -- Nitrogen gas-charge maintains tire-to-road contact for improved ride and handling by reducing aeration and shock fade
  • BUY WITH CONFIDENCE -- Comes with Monroes 90-day Risk Free Ride Offer and Limited Commercial Warranty


Specifications


Compressed Length:14.5625
Compressed Length:369.9
Dust Shield Included:Yes
Dust Shield Material:Metal
Extended Length:23.9063
Extended Length:607.2
Gas Charged:Yes
Hydraulic Lockout:No
Includes Bump Stop:No
Internal Rebound Bumper:No
Lower Mount Code:LS54
Lower Mount Type:Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL
Part Description:Shock Absorber
Parts Pack(s):None
Shock Absorber Body End Measuring Point:Center of Loop
Shock Absorber Rod End Measuring Point:Center of Loop
Travel Length:9.343
Travel Length:237.3
Upper Mount Code:LS54
Upper Mount Type:Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL


Interchange


  • Navistar: AMS660157
  • General Motors: 5552115
  • General Motors: 4790218
  • Mack: 600157MT
  • General Motors: 22012169
  • Mack: 14QK2100P1
  • General Motors: 4975510
  • General Motors: 5549599
  • Kenworth: 1672501
  • Gabriel: 83321
  • FCS: F347319
  • Sachs: 316320
  • Neway: 57306878
  • KYB: KG6002A
  • ACDelco: 55077
  • Bulldog HD: HD12140579
  • Mack: 14QK2100
  • Volvo GM Heavy Truck: 3919910
  • Koni: 881422
  • Motorcraft: CAX878
  • General Motors: 5534427
  • Navistar: AMS600157
  • General Motors: 5398598
  • Fruehauf: UEY11241
  • General Motors: 5534401
  • Monroe Shocks & Struts: 661157
  • Dayton Parts: 44183221
  • Neway: OE10219
  • FCS: F347315
  • Monroe Shocks & Struts: 6878
  • Mack: 25621798
  • NAPA Shocks: 66878
  • Fruehauf: UEY1124001
  • Mack: 660157MT
  • Reyco Granning: 1672501
  • Monroe Shocks & Struts: 601157
  • Monroe Shocks & Struts: 660157
  • General Motors: 22012196
  • Western Star: 373013412
  • Kenworth: 5533699
  • Gold Shock Absorber: 9161058
  • PAI: HSA5080
  • General Motors: 4940653
  • General Motors: 22012096
  • Monroe Shocks & Struts: 600157
  • Monroe Shocks & Struts: OE10219
  • General Motors: 3192891
  • General Motors: 3192892
  • Neway: 57366878
  • Gabriel: 83221


Fitment


  • 1960-1962 Chevrolet C50        Position: Rear
  • 1960-1962 Chevrolet C60        Position: Rear
  • 1960-1961 Chevrolet C70        Position: Rear
  • 1969-1989 Chevrolet C60        Position: Rear
  • 1979-1989 Chevrolet C70        Position: Rear
  • 1979-1980 Chevrolet C70        Position: Front
  • 1980-1989 GMC C5000        Position: Rear
  • 1980-1989 GMC C7000        Position: Rear
  • 1987-2022 Kenworth T800        Position: Rear
  • 1995-2008 Kenworth T300        Position: Rear
  • 1995-2005 Peterbilt 330        Position: Rear
  • 2007-2020 Peterbilt 330        Position: Rear
  • 2008-2022 Kenworth T270        Position: Rear
  • 2008-2015 Peterbilt 210        Position: Rear
  • 2010 Peterbilt 220        Position: Rear
  • 2013-2020 Peterbilt 220        Position: Rear
  • 2011-2018 Peterbilt 337        Position: Rear
  • 2012-2020 Western Star 4700SB        Position: Rear
  • 2013-2020 Kenworth T680        Position: Rear
  • 2013-2020 Peterbilt 579        Position: Rear
  • 2016-2022 Kenworth T370        Position: Rear
  • 2017-2020 Peterbilt 520        Position: Rear
  • 1969-1989 Chevrolet C50        Position: Rear
  • 1968-1972 Chevrolet C50        Position: Front
  • 1968-1972 Chevrolet C60        Position: Front
  • 1975-1980 Chevrolet C50        Position: Front
  • 1975-1980 Chevrolet C60        Position: Front
  • 1980-1989 GMC C6000        Position: Rear
  • 1981-2022 Kenworth W900        Position: Rear
  • 1986-2008 Kenworth T600A        Position: Rear
  • 1987-1989 Chevrolet S7        Position: Rear
  • 1993-2005 Kenworth K300        Position: Rear
  • 2007 Peterbilt 220        Position: Rear
  • 2008-2018 Kenworth T170        Position: Rear
  • 2008-2018 Peterbilt 389        Position: Rear
  • 2010-2020 Kenworth T400        Position: Rear
  • 2010-2018 Peterbilt 348        Position: Rear
  • 2011-2018 Peterbilt 587        Position: Rear
  • 2012-2020 Western Star 4700SF        Position: Rear
  • 2013-2022 Kenworth K270        Position: Rear
  • 2013-2022 Kenworth K370        Position: Rear
  • 2014-2020 Kenworth T880        Position: Rear


Customer Questions
Is It OK To Drive With Bad Struts?
Driving with bad struts is unsafe. Car bounces while driving. Replace them immediately. Shop struts on PartsHawk.com.
How Can I Tell If My Struts Need To Be Replaced?
If your car bounces excessively, experiences poor handling, or has uneven tire wear, you may have bad struts. Check for signs of bad struts like nose dive during braking. Shop for replacement shocks and struts on PartsHawk.com.
What Do Your Struts Do?
Car struts are essential for smooth driving. They support the weight of the vehicle, dampen shocks, and provide stability. Replace worn out struts on a car with quality products from PartsHawk.com.
What Do Your Shocks Do?
Car shocks absorb impact from bumps and uneven road surfaces, improving ride comfort and handling. It's recommended to replace shocks every 50,000 miles for optimal performance. Shop shocks for your car at PartsHawk.com.
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