The Monroe Shocks & Struts 66405 rear shock absorber for the 1998-2023 Freightliner MT45 is gas-charged, and it controls spring and axle movement for quicker response and a stable, more comfortable ride.
Bouncing after bumps or extra vibration through the chassis can mean a rear shock absorber is worn, but a worn mount or a tired spring can feel the same. With the truck parked and the engine off, and without getting under it, look for wet oil on the shock absorber body or a cracked bushing before you replace it. This listing is one rear shock absorber; the shock absorbers on the rear axle are normally replaced together.
It is a direct-fit replacement for the 1998-2023 Freightliner MT45.
Fit and size
Build and materials
In the box: one rear shock absorber with mounting hardware.
Interchange: 1615064000 · 9160545
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This part cross-references / interchanges with the following part numbers:
Is Monroe 66405 the right rear shock absorber for a 1998-2023 Freightliner MT45?
Yes. The Monroe Shocks & Struts 66405 is a rear shock absorber that fits the 1998-2023 Freightliner MT45 as a direct-fit replacement.
Does the Monroe 66405 Magnum shock absorber come with mounting hardware?
Yes. The Monroe Shocks & Struts 66405 rear shock absorber comes with its mounting hardware included in the box.
What are the compressed and extended lengths of this Magnum rear shock absorber?
This rear shock absorber measures 11.875 in (301.6 mm) compressed and 18.875 in (479.4 mm) extended, which gives 7 in of travel.
What can oil streaks or a bouncy ride mean for a Magnum rear shock absorber?
Oil running down the body, bouncing after bumps or extra vibration can mean this rear shock absorber is worn and no longer damping the way it should.
How does the nitrogen gas charge in this Monroe Magnum shock absorber help the ride?
The nitrogen gas charge in this rear shock absorber reduces aeration and shock fade, which helps keep the tires in contact with the road for better ride and handling.
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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.
