Monroe 66189 | Suspension Shock Absorber

Part Number
Magnum Cab Shock Absorber

Fits: 89-05 Mack CH, 91-07 Mack CL

Special Price $50.30 Regular Price $59.18
In stock
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Estimated Ship Date: 1 Business Day or Less
The Monroe® Magnum™ Cab Shock isolates the cab from the frame, offering a smoother, more comfortable ride. Specifically designed for today's heavy-duty cab suspension, the gas-charged Monroe Magnum™ Cab Shock utilizes patented groove tube technology and velocity-sensitive valving to deliver a new industry standard in driver comfort, with reduced fatigue. (On most applications)

BRAND: Monroe Shocks & Struts


  • Magnum Cab Shock Absorber
  • 10-stage valving: Reacts to wide range of driving conditions - on most applications
  • Magnum Cab Shock Absorber
  • Monroe Shocks & Struts Magnum Cab 66189 Shock Absorber
  • 1-3/8-inch (35 mm) bore: Larger bore than most shocks to provide more efficient and consistent control - on most applications
  • .05-inch pressure tube withstanding pressure of 9KPSI - On most applications
  • 2-inch (50.8 mm) reserve tube: More fluid for more consistent performance - on most applications
  • Loop welding technique: Resistance weld with additional 360-degree weld provide up to 12,100 lbs. (5,488 kg) tensile strength for maximum durability - when required
  • 2005-1989 Mack CH Cab, 2008-1995,1991-1990 Mack CH-602 Cab, 2007-1991 Mack CL Cab, 1999-1991 Mack CL600 Cab, 2007-1993 Mack CL700 Cab, 2001-2000 Mack CL-700 Cab
  • Nitrogen gas-charged: For improved ride and handling, helps maintain tire to road contact by reducing aeration
  • Tenneco shouldered bushings: Shouldered bushing and bonded bushing with sleeve designs prevent (bushing walkout) for improved quality and durability - on most applications
  • PTFE coated bearing: Reduces friction during operation between the rod and rod guide, improving durability - on most applications
  • Robust hydraulic lock-out: Prevents over-extension of the suspension, top-out of the piston and averts damage to the seal assembly - on most applications


Compressed Bumper StopNo
Compressed Length8.7500
Dust ShieldYes
Dust Shield IncludedYes
Dust Shield MaterialMetal
Extended Bumper StopNo
Extended Hydraulic LockoutNo
Extended Length10.8750
Lower Mounting CodeS4
Lower Mounting DescriptionStem Mount - 2.3/8" Stem Length X 3/8"-16 Thread Pitch
Parts PackP01134
Travel Length2.1250
Upper Mounting CodeXP8
Upper Mounting DescriptionCross Pin Mount - Open Ended, 5/16" Hole ID (Both Ends) X 3" Pin Length (Hole Center to Center)



  • Sachs: 316828
  • Gabriel: 83041
  • Mack: 25624837
  • OEM: 12110008
  • Mack: 14QK391BM
  • LINK CAB: 12110008
  • Peterbilt: 12110008
  • Sachs: 316829
  • Mack: 14QK391AM
  • VOLVO / WHITE / GMC: SA3041
  • Mack: 14QK391BM2
  • Meritor: M83041
  • Mack: 25624698
  • Mack: 14QK391AM2


  • 1989-2005 Mack CH - Position: Cab
  • 1991-2007 Mack CL - Position: Cab
Customer Questions
How often should shock absorbers be replaced?
Shock absorbers should generally be replaced every 50,000 miles or every 5-7 years
How to replace shock absorbers?
To replace shock absorbers, you need to remove the wheel and tire assembly, unbolt the old shock absorber, replace it with a new one, and tighten the bolts. Then, reinstall the wheel and tire, and test the new shocks.
Why do shock absorbers leak?
Shock absorbers can leak due to worn seals, damage to the piston or cylinder, or corrosion from exposure to moisture and road salt.
Can shock absorbers be replaced?
Yes, shock absorbers can be replaced when they start to wear out or fail.
Please, mind that only logged in users can submit questions

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