Monroe 66683 | Rear Suspension Shock Absorber

Part Number
Magnum Shock Absorber

Fits: 80-89 International 1654, 86-92 International 1652SC, 87-92 International 1452SC, 89-99 International 9300, 90-94 International 3700, 90-04 International 3800, 90-94 International 4600LP, 90-02 International 4700LP, 90-99 International 9400, 13 International 4300LP, 13 International 4400LP

Special Price $49.18 Regular Price $57.86
In stock
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Estimated Ship Date: 1 Business Day or Less
The Monroe® Magnum™ shock absorber for class 3-6 Vehicles is gas-charged for quicker response and a stable, more comfortable ride. Replacing worn-out units with hard-working Magnum™ shocks can help reduce excessive vibration. The result can be better tire life, less downtime and a lower cost per mile.

BRAND: Monroe Shocks & Struts


  • .05-inch Pressure tube withstanding pressure of 9KPSI
  • 1-3/8-inch (35 mm) bore: Larger bore than most shocks to provide more efficient and consistent control - on most applications
  • 10-stage valving: Reacts to wide range of driving conditions - on most applications
  • 1992-1987 International 1452SC Rear, 1992-1986 International 1652SC Rear, 1989-1980 International 1654 Rear, 1994-1990 International 3700 Rear, 1995-1990 International 3700 School Bus Rear, 2004-1990,1987 International 3800 Rear
  • 2-inch (50.8 mm) or 2-1/4-inch (57.2 mm) reserve tube: More fluid for more consistent performance - when required
  • Loop welding technique: Resistance weld with additional 360-degree weld provide up to 13,100 lbs. (6,395 kg) tensile strength for maximum durability - when required
  • Magnum Shock Absorber
  • Monroe Shocks & Struts Magnum 66683 Shock Absorber
  • Nitrogen gas-charged: For improved ride and handling, helps maintain tire to road contact by reducing aeration - 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
  • Tenneco shouldered bushings: Shouldered bushing and bonded bushing with sleeve designs prevent (bushing walkout) for improved quality and durability - on most applications


Compressed Bumper StopNo
Dust Shield IncludedYes
Extended Bumper StopNo
Extended Hydraulic LockoutYes
Lower Mounting CodeLS53
Lower Mounting DescriptionLoop Bushing & Sleeve Mount - 5/8"-16MM Sleeve ID X 2" Sleeve OAL
Parts PackNone
Upper Mounting CodeLS53
Upper Mounting DescriptionLoop Bushing & Sleeve Mount - 5/8" Sleeve ID X 2" Sleeve OAL



  • International: 1660846C92
  • Motorcraft: AA620
  • Gabriel: 83101
  • Sachs: 317932
  • OEM: 1660846C92
  • OEM: 1660846C91
  • International: 1660846C91
  • OEM: 4C4Z18125CC
  • Meritor: M83101
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.
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