Keep your hardworking Ford truck's rear suspension composed under load with the Monroe Gas-Magnum Rear Suspension Shock Absorber 34930. Engineered for full-size trucks and vans, it drops in as a direct-fit rear replacement for the 1980-1989 Ford F-150, 1980-1991 Ford F-250, 1980-1997 Ford F-350, and the 1999-2004 Ford F-450 Super Duty and F-550 Super Duty. See the Buyer's Guide tab for engine-level details.
- Firm control, not a harsh ride: full-displaced valving on the compression cycle helps deliver controlled ride and handling, with up to twice the fluid capacity of standard 1-in. bore shocks.
- Built to last: heavy-duty nitrocarburized rod (non-dust-shield units only) and a sintered iron piston enhance durability, while a self-lubricating fluid seal reduces friction against the piston rod.
- Consistent performance: OE all-weather fluid handles extreme temperatures, and a nitrogen gas charge helps maintain tire-to-road contact by reducing aeration and shock fade.
- Greater capacity: a larger bore and bigger 2-in. reserve tube hold more oil so the shock can work efficiently for a longer service life.
Backed by Monroe's Limited Lifetime Warranty and exclusive Feel the Difference Guarantee. Shocks work best replaced as a pair for balanced ride control.
Interchange: 52029 · TS3432152B · F81A18080DCA · F81Z18125DC · 58456 · 58461 · 58811 · 9160761 · KG5443 · FD136 · 210170 · 32239 · 37038 · ASH23486 · ASH247 · AT610 · AT611 · SH81510 · 76930 · 12140433
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Which vehicles does the Monroe 34930 fit?
It's a rear shock for the 1980-1989 Ford F-150, 1980-1991 F-250, 1980-1997 F-350, and 1999-2004 F-450 and F-550 Super Duty. Check the Buyer's Guide tab to confirm your vehicle.
Is this a front or rear shock absorber?
This is a rear suspension shock absorber, cataloged for the rear axle of the listed Ford truck applications.
How many should I buy?
Shocks are sold individually. For balanced ride control, it's best practice to replace both rear shocks together as a matched pair.
What makes the Gas-Magnum different?
It uses a larger bore and a 2-in. reserve tube for more fluid capacity than standard 1-in. bore shocks, plus full-displaced compression valving for firm control without a harsh ride.
What are signs my shocks may need replacing?
Common signs include excessive bouncing over bumps, nose dive when braking, a bouncy or wallowing ride, and uneven or cupped tire wear. Diagnose the cause before replacing.
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