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Rear Ride Control Built For Electric Truck Weight
The KYB MonoMax rear strut is calibrated to manage the added battery weight of the Ford F-150 Lightning while delivering up to 40 percent more damping than a factory twin-tube design. KYB5640017 restores confident rear end control and consistent ride quality for daily driven Lightning trucks.
Key Features
- KYB5640017 uses a monotube gas charged design for faster response
- Calibrated for the added weight of the F-150 Lightning battery pack
- Delivers up to 40 percent more damping over OE twin-tube struts
- Direct bolt-on replacement, no modification required
- KYB5640017 restores factory ride height and handling feel
- Larger piston diameter improves heat dissipation under sustained load
Fitment Table
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2022-2025 | Ford | F-150 Lightning | Pro |
| 2022-2025 | Ford | F-150 Lightning | XLT |
| 2022-2025 | Ford | F-150 Lightning | Lariat |
| 2022-2025 | Ford | F-150 Lightning | Platinum |
Specifications
| Detail | Value |
|---|---|
| MPN | 5640017 |
| Brand | KYB |
| Series | MonoMax |
| Position | Rear |
| Design | Monotube gas charged |
| UPC | Not publicly listed by manufacturer |
What's Included
- One KYB5640017 MonoMax rear strut assembly
About KYB
KYB has manufactured shocks and struts for original equipment and aftermarket applications for decades, supplying ride control components trusted by truck and SUV owners across North America. The MonoMax line applies OE manufacturing standards to a monotube design built for trucks carrying additional weight, including electric platforms like the F-150 Lightning.
FAQ
What is the KYB5640017?The KYB5640017 is a MonoMax rear strut engineered specifically for the Ford F-150 Lightning electric truck. Its monotube gas charged design delivers up to 40 percent more damping than a factory twin-tube strut to handle the added battery weight.
Why can't I just use a regular F-150 strut on my Lightning?The Lightning carries significantly more weight from its battery pack, so this strut is calibrated specifically to manage that load, unlike a standard gas F-150 strut.
Is this a direct bolt-on or will I need adapters?It's a direct bolt-on replacement that installs in the factory strut location without modification.
Will this affect my ride height?No, it's designed to restore factory ride height rather than raise or lower the truck.
Does this fit all Lightning trims?Yes, it fits Pro, XLT, Lariat, and Platinum trim Lightning trucks.
Do I need to replace both rear struts at the same time?It's sold individually, but replacing both sides together is recommended for even handling.
Will I notice a firmer ride compared to the factory strut?The monotube design does deliver more damping force, so some drivers notice a slightly firmer, more controlled feel compared to the factory twin-tube setup.
How long does installation typically take?A single strut swap is usually a few hours for someone comfortable with basic suspension work, longer if you're doing both sides.
Install Instructions
- Raise the rear of the truck and support it on jack stands.
- Remove the rear wheel and disconnect any brake line or sensor brackets attached to the strut.
- Remove the upper strut mount nuts and lower strut bolts to free the factory strut.
- Transfer any factory mounting hardware to the KYB5640017 if required.
- Install the KYB5640017 assembly and torque all fasteners to factory specification.
- Reinstall the wheel and repeat on the opposite side if replacing in pairs.
KYB
KYB offers a complete line of shock absorbers, struts, and strut assemblies for cars, trucks, SUVs and Cross-overs. We also design and manufacture steering stabilizers, and provide a full line of shock and strut accessories including mounting hardware, coil spring insulators, coil springs, strut mounts, jounce bumpers, and bellows. KYB is one of the world’s largest suppliers of shocks and struts for new vehicle manufacturers. Our products can be found on some of the most popular cars, SUVs and trucks in North America. Because we make ‘original equipment’ we know exactly how vehicles perform and handle when new, and we can help keep them operating as designed, for as long as they’re on the road. The KYB catalog includes the following models: Excel-G, Strut-Plus, Gas-a-Just, MonoMax, Truck-Plus, KYB JAOS, Truck-Plus, Leveling Assembly, Strut Mounts and Boots, Steering Stabilizers, Self-Leveling & Electronic Shocks.
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