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KYB 3440121 Suspension Shock Absorber - Rear
| Brand | KYB 3440121 |
|---|---|
| Position | Rear |
| Product line | Excel-G |
| Fits | Ford · 18 vehicles |
OE replacement. Restores original ride control and handling.
Twin-tube design. Nitrogen gas-charged for consistent damping.
Triple-lip fluid seal. Helps reduce oil and gas leakage.
Cross-references HC3Z18125AB, HC3Z18125EB and HC3Z18125EM for the same application. See all 9.
KYB Excel-G Rear Shock for Ford Super Duty
Restore rear suspension control with the KYB Excel-G shock absorber, part number 3440121. This OE-style replacement is built for Ford Super Duty trucks where stable handling, braking response, and lane-change control matter as much as ride comfort.
Compatible with 2017-2020 Ford F-250 Super Duty, rear, and 2017-2020 Ford F-350 Super Duty, rear, this KYB Excel-G is calibrated to return the truck to its original damping behavior rather than alter it.
Key Features
- KYB recommended OEM replacement shock for factory-style ride control
- Vehicle-specific damping valves manage tire contact, steering response, and body movement
- Triple-lip fluid seal helps reduce oil and gas leakage
- Nitrogen gas-charged, twin-tube design for consistent damping performance
- Strong strut body and bracket construction helps minimize flex and maintain alignment
- Supports proper operation of electronic safety systems by helping the suspension perform as engineered
Product Details
The KYB Excel-G line is built on the same OE assembly lines KYB uses for original equipment supply, with OE-quality components and calibration focused on restoring designed performance. For Ford F-250 Super Duty and Ford F-350 Super Duty rear suspension service, KYB Excel-G part number 3440121 provides a direct replacement approach for drivers who want factory-like control, stability, and handling response. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Excessive rear bounce after bumps or dips
- Reduced stability during braking or lane changes
- Uneven tire contact caused by weak damping
- Loose or unsettled rear-end handling on loaded or unloaded driving
- Suspension performance loss from worn OE shock absorbers
Installation Notes
Fits 2017-2020 Ford F-250 Super Duty, rear. Fits 2017-2020 Ford F-350 Super Duty, rear. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions where specified. Verify rear suspension condition, mounting points, and alignment-related components before installation. Part number 3440121 should be matched to the vehicle’s rear application and OE interchange references before service.
Quality Assurance
KYB is a major OE shock and strut supplier, and the Excel-G line is produced to restore original vehicle behavior using OE-quality components and vehicle-specific calibration. For Ford Super Duty rear suspension service, KYB 3440121 is built to support consistent ride control and handling performance.
| Year | Make | Model | Body Type | Drive Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2022 | Ford | F-350 Super Duty | Crew Cab Pickup | 4WD | Rear | Recommended OEM Replacement; Excel-G |
| 2021 | Ford | F-350 Super Duty | Crew Cab Pickup | 4WD | Rear | Recommended OEM Replacement; Excel-G |
| 2020 | Ford | F-250 Super Duty | — | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2020 | Ford | F-350 Super Duty | Crew Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2020 | Ford | F-350 Super Duty | Extended Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2020 | Ford | F-350 Super Duty | Standard Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2019 | Ford | F-250 Super Duty | — | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2019 | Ford | F-350 Super Duty | Crew Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2019 | Ford | F-350 Super Duty | Extended Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2019 | Ford | F-350 Super Duty | Standard Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2018 | Ford | F-250 Super Duty | — | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2018 | Ford | F-350 Super Duty | Crew Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2018 | Ford | F-350 Super Duty | Extended Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2018 | Ford | F-350 Super Duty | Standard Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2017 | Ford | F-250 Super Duty | — | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2017 | Ford | F-350 Super Duty | Crew Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2017 | Ford | F-350 Super Duty | Extended Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
| 2017 | Ford | F-350 Super Duty | Standard Cab Pickup | 4WD | Rear | Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G |
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