Vehicle Compatibility
Ford Super Duty Fitment (Front or Rear, depending on specific mount):
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1999–2004 Ford F-250 Super Duty
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1999–2004 Ford F-350 Super Duty
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Also fits early Ford F-450/F-550 Super Duty platforms from the same years
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Potential fitment on E-550 Econoline Super Duty in specific years around 2002–2003
Designed for midsize and full-size trucks and vans, Monroe® Gas-Magnum® shock absorbers provide firm control without a harsh ride. With up to twice the fluid capacity of standard 1-in. bore shocks, they work more efficiently with less effort.
Performance & Ride Benefits
With the Monroe Gas-Magnum 34686 installed, you’ll notice:
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Improved rear stability when towing
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Reduced bounce with payload
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Better braking control
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Improved highway tracking
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Less rear-end sway
Firm when loaded. Controlled when empty. Exactly how a Super Duty should behave.
MONROE GAS-MAGNUM SHOCK ABSORBERS
Designed for mid to full-size, hardworking pick-up trucks and vans, Monroe Gas-Magnum shock absorbers provide firm control without a harsh ride. With up to twice the fluid capacity of standard 1-in. bore shocks, they work more efficiently with less effort.
Built for Real Truck Use
These shocks are engineered for:
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Work trucks
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Plow trucks
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Tow rigs
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Fleet vehicles
Durability highlights include:
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Corrosion-resistant finish
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Heavy-duty seals
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Long-life internal components
They’re not flashy—and that’s the point.
Installation Notes
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Direct bolt-on replacement
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Uses factory mounting points
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No special modifications required
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Replace shocks in pairs for balanced performance
A suspension inspection and alignment check are recommended after installation.
Hardworking midsize, full-size trucks and vans can count on Monroe Gas-Magnum shocks to carry the load. Not just for ride comfort, shocks are necessary for the safe handling of your vehicle. By maintaining vertical loads placed up on the tires, shocks help ensure consistent tire-to-road contact. Shocks also help maintain a balanced ride by providing resistance to vehicle bounce, roll and sway as well as brake dive and acceleration squat.
CAUSES & CONSEQUENCES OF SHOCK FAILURE
Like many parts on your vehicle, shocks are subject to wear. Causes include damaged bushings, exposure to the elements, loss of oil viscosity and deteriorated components. Driving with worn shocks can result in problems ranging from reduced braking efficiency, tire wear, loss of stability and damage to other suspension parts.
DIAGNOSING NOISE WITH NEW SHOCKS
If noise is present with a replacement shock absorber, check that the mount is tightened securely and look for other worn suspension parts. Some shock absorbers utilize a “clevis” type mount, which must squeeze the sides of the shock’s “mounting sleeve” very securely in order to prevent noise. Using new hardware and mounting bolts help ensure its tightened securely. Check the brackets to make sure they didn’t get spread apart excessively when the original shock was removed.
IMPORTANCE OF ALIGNMENT
Always perform an alignment whenever replacement shocks, struts or other ride control parts are installed. Camber, toe and caster settings can all be affected by installing new shocks. Failure to make sure the vehicle’s alignment is within factory specifications can lead to problems like premature tire wear.
HOW TO CONDUCT A SHOCK INSPECTION
Shocks may not show any visible signs of wear, make sure to request a ride control inspection every time your vehicle is brought in for service to ensure they’re in optimal operating condition. When inspecting a vehicle’s shocks: assess how the vehicle is used and perform ride and physical evaluations. Get an understanding of the vehicle’s repair history, the way the vehicle handles and its intended use for clues if the shocks might need changing. Next, take the vehicle for a test drive to determine whether the vehicle’s steering, stopping and stability are compromised. Wrap up the inspection with a physical examination for symptoms of wear which may indicate new shocks are required.
Safety & Suspension Health
Worn shocks increase stopping distance and reduce control—especially dangerous in a heavy truck. Replacing tired dampers restores predictable handling and reduces stress on suspension, steering, and tires.
This is safety maintenance, not optional comfort.
Why Buy Monroe from Pro Street Online
At Pro Street Online, we don’t sell mall-crawler suspension. The Monroe Gas-Magnum 34686 delivers proven heavy-duty performance, OEM-level reliability, and real-world durability, making it a smart replacement for F-250 owners who use their truck like a truck.
Russell Ruch –
Great shocks for the money worked on my 03 f350 non duelly
Scott Covington –
Friends said go KYB or Bilsteins…..sorry, I’m not driving a Ferrari or Lambo and not paying those prices. These Monroe shocks do great. I’ve got about 20k on them since purchase and installation, and they are still working like new and at a fair price. Also purchased the matching pair for the other end at the same time.
Sam –
Night and day difference on the suspension on my f350 dump truck.
Lennard Toccaline –
Grest
The real ranch guy –
18 mm and 15 mm needed. No need to raise truck,easy pop out and pop in. Good quality great price, sold individually.
J. Neitz –
the shocks are a great shock for the value, great ride quality, perfect fit, and low noise level.
Kendall –
Holds better on the road while driving.
Saddle chin –
Difficulty installing as the bottom bushings on both shocks weren’t correctly pressed in place. Rubber and metal bushings stuck out 3/16” to one side, impossible to install in that position. Had to work bushings in place, luckily we have a press.
Amazon Customer –
Very happy with my purchase
Exactly as discribed. Very happy with my purchase.