Freightliner FLC120 Shock Absorbers

Frequently Asked Questions About Freightliner FLC120 Shock Absorbers

How do I know when my FLC120 shock absorbers need to be replaced?

Common signs of worn shocks include excessive bouncing, a rough or unstable ride, uneven tire wear, and visible oil leakage or damage on the shock body. If your truck feels less stable during braking or cornering than it used to, it is a good indication that the shocks have lost their damping ability and should be inspected or replaced.

Will these shock absorbers fit my specific FLC120 model year and axle configuration?

Freightliner FLC120 trucks were produced over a long run with variations in front and rear suspension setups, so shock length, mounting style, and eyelet size can differ by year and axle position. Always check the listed specifications and part numbers against your truck's front or rear application before ordering to ensure a proper fit.

Do I need to replace shocks in pairs?

Yes, it is generally recommended to replace shocks on the same axle in pairs, even if only one side shows visible wear. Shocks wear at a similar rate over time, and replacing just one can lead to uneven handling and inconsistent ride quality between the left and right sides.

What is the typical lifespan or mileage interval for FLC120 shock absorbers?

There is no fixed mileage number that applies to every truck, since shock life depends heavily on load weight, road conditions, and driving style. Many fleets inspect shocks during regular PM services and replace them based on visible wear, leaking, or noticeable ride degradation rather than mileage alone.

Can I install these shock absorbers myself, or should I have a professional do it?

Shock absorber replacement is a relatively straightforward job for someone comfortable with basic mechanical work and the proper tools, typically involving removing the old shock's mounting bolts and installing the new unit in the same orientation. However, if your truck has rusted or hard-to-access hardware, or if you are unsure about torque specs and mounting orientation, having a qualified technician handle the installation is a safer option.