Smooth out the ride and help keep the tires planted on your hardworking Ford truck with the Monroe Gas-Magnum Rear Suspension Shock Absorber (MPN 34658). It's a direct-fit replacement for the 1997-2003 Ford F-150 and the 2004 Ford F-150 Heritage, engineered for full-size trucks that carry and tow.
Backed by Monroe's Limited Lifetime Warranty and Feel the Difference Guarantee. If worn rear shocks are the cause of excessive bounce, poor handling, or uneven tire wear, this Gas-Magnum unit replaces them. Sold individually; replacing both rear shocks together as a matched pair is recommended for balanced control.
Interchange: 813045 · HD12140875 · MS3431532B · 2L3Z18125BA · 58715 · 344375 · FD115 · 210229 · 32305 · 37137 · 911134 · SH81913 · 76658 · RS5234 · RS55234 · 12140192
This part cross-references / interchanges with the following part numbers:
What vehicles does the Monroe Gas-Magnum 34658 fit?
It's a rear shock absorber for the 1997-2003 Ford F-150 and the 2004 Ford F-150 Heritage. Check the Buyer's Guide tab to confirm the fit for your vehicle.
Is this a front or rear shock absorber?
Rear. The Gas-Magnum 34658 mounts at the rear suspension of the listed applications.
Should I replace both rear shocks at the same time?
It's sold individually, but replacing both rear shocks together as a matched pair is recommended for balanced, even control and handling.
What does the nitrogen gas-charge do?
The nitrogen gas-charge helps maintain tire-to-road contact by reducing aeration and shock fade, supporting more consistent ride and handling.
What are signs my rear shocks may need replacing?
Excessive bouncing over bumps, nose-diving, poor handling, or cupped/uneven tire wear can be signs a shock may need replacing. Diagnose the cause before replacing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
