Monroe 66878 | Suspension Shock Absorber

Part Number
66878
Magnum Shock Absorber

Fits various model years of the following vehicles: Chevrolet, GMC, Kenworth, Peterbilt, Western Star
Special Price $44.25 Regular Price $52.06
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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
  • 1979-1989 Chevrolet C70 | Position: Rear
  • 2013-2022 Peterbilt 579 | Position: Rear
  • 2021-2024 Kenworth T280 | Position: Rear
  • 2013-2020 Peterbilt 220 | Position: Rear
  • 2011-2018 Peterbilt 337 | Position: Rear
  • 1968-1972 Chevrolet C60 | Position: Front
  • 1993-2005 Kenworth K300 | Position: Rear
  • 2008-2018 Kenworth T170 | Position: Rear
  • 1969-1989 Chevrolet C60 | Position: Rear
  • 1980-1989 GMC C5000 | Position: Rear
  • 1980-1989 GMC C7000 | Position: Rear
  • 2010 Peterbilt 220 | Position: Rear
  • 2013-2020 Kenworth T680 | Position: Rear
  • 2016-2023 Kenworth T370 | Position: Rear
  • 1968-1972 Chevrolet C50 | Position: Front
  • 1975-1980 Chevrolet C50 | Position: Front
  • 1986-2008 Kenworth T600A | Position: Rear
  • 2010-2018 Peterbilt 348 | Position: Rear
  • 2013-2022 Kenworth K370 | Position: Rear
  • 2014-2023 Kenworth T880 | Position: Rear
  • 1980-1989 GMC C6000 | Position: Rear
  • 2007 Peterbilt 220 | Position: Rear
  • 2008-2018 Peterbilt 389 | Position: Rear
  • 2012-2020 Western Star 4700SF | Position: Rear
  • 1987-1989 Chevrolet S7 | Position: Rear
  • 2013-2022 Kenworth K270 | Position: Rear
  • 1960-1961 Chevrolet C70 | Position: Rear
  • 2008-2015 Peterbilt 210 | Position: Rear
  • 2012-2020 Western Star 4700SB | Position: Rear
  • 2017-2020 Peterbilt 520 | Position: Rear
  • 1960-1962 Chevrolet C60 | 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
  • 1975-1980 Chevrolet C60 | Position: Front
  • 2010-2020 Kenworth T400 | Position: Rear
  • 2011-2018 Peterbilt 587 | Position: Rear
  • 1969-1989 Chevrolet C50 | Position: Rear
  • 1981-2022 Kenworth W900 | Position: Rear
  • 1979-1980 Chevrolet C70 | Position: Front
  • 2008-2023 Kenworth T270 | Position: Rear


Customer Questions
I'm planning a DIY repair. Do you have any resources or guides for installing Monroe shocks on a common sedan like a Toyota Corolla?
Yes! PartsHawk carries Monroe shocks and quick struts for sedans like the Toyota Corolla, plus we offer helpful install tips for DIYers. Whether you're replacing worn struts or upgrading ride quality, we've got the parts and guidance. Check out shock & strut assemblies and diagnostic tools to make your install smooth.
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