Firm truck control without a punishing ride — the Monroe Gas-Magnum Front Suspension Shock Absorber 34657 dampens suspension movement to help maintain tire-to-road contact on hardworking full-size trucks and vans. It installs at the front for the 1997-2002 Ford Expedition, 1997-2003 Ford F-150, 1997-1999 Ford F-250, and 2004 Ford F-150 Heritage — see the "Vehicles it fits" section for engine-level fitment.
- Built for trucks and vans: Full-displaced valving on the compression cycle is engineered to deliver controlled ride and handling for midsize and full-size trucks and vans.
- Larger capacity: A bigger bore and 2-in. reserve tube hold more oil — up to twice the fluid capacity of standard 1-in. bore shocks — so the shock works efficiently for a longer service life.
- Durable internals: A heavy-duty nitrocarburized rod (non-dust-shield units only) and sintered iron piston enhance durability, while a self-lubricating fluid seal reduces friction against the piston rod to reduce wear.
- Nitrogen gas-charge: Helps maintain tire-to-road contact by reducing aeration and shock fade; OE all-weather fluid contains modifiers to handle extreme temperatures for smooth rod reaction.
Backed by Monroe's Limited Lifetime Warranty and the exclusive Feel the Difference Guarantee.
Interchange: 813044 · HD12140874 · TS3332641B · 2L3Z18124BA · 58716 · 344368 · KG54313 · FD105 · 210228 · 32304 · 37133 · 911133 · ASH172 · SH81912 · 76657 · RS5233 · RS55233 · 12140191
This part cross-references / interchanges with the following part numbers:
813044, HD12140874, TS3332641B, 2L3Z18124BA, 58716, 344368, KG54313, FD105, 210228, 32304, 37133, 911133, ASH172, SH81912, 76657, RS5233, RS55233, 12140191
Frequently Asked Questions
What does this Monroe shock absorber do?
It dampens front suspension movement to help control ride and handling and maintain tire-to-road contact. If your worn front shocks are the cause of poor control, the Gas-Magnum 34657 replaces them.
Which vehicles does the 34657 fit?
The front position on the 1997-2002 Ford Expedition, 1997-2003 Ford F-150, 1997-1999 Ford F-250, and 2004 Ford F-150 Heritage. Check the "Vehicles it fits" section for full engine-level fitment.
How large is the reserve tube?
It uses a larger bore and a 2-in. reserve tube that hold more oil — up to twice the fluid capacity of standard 1-in. bore shocks — so the shock works efficiently for longer service life.
What is the nitrogen gas-charge for?
The nitrogen gas-charge helps maintain tire-to-road contact by reducing aeration and shock fade, which supports more consistent ride and handling.
Are these shocks sold in pairs?
This listing is for one shock absorber. For even, balanced front suspension performance, replacing both sides together as a matched pair is a recommended best practice.
