HomeSuspension > Shocks and StrutsKYB 5540018 Shock Absorber - Rear
Part #: 5540018

KYB 5540018 Shock Absorber - Rear

Gas-a-just, Rear
18 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$72.94Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Gas-a-just, Rear
Fitment: Ford, F-250 Super Duty and F-350 Super Duty
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of KYB Gas-a-just Suspension Shock Absorber

The KYB Gas-a-just 5540018 suspension shock absorber is engineered for Ford F-250 Super Duty and F-350 Super Duty trucks. Designed to restore original handling and control, this shock absorber provides consistent performance for heavy-duty applications.

  • Compatible with Ford F-250 Super Duty and F-350 Super Duty models
  • Part number 5540018 for precise identification
  • Gas-charged design for improved damping response
  • Durable construction suitable for heavy-duty suspension systems
  • Part of the KYB Gas-a-just product line focused on reliable shock absorber performance

Detailed Product Description

The KYB Gas-a-just 5540018 shock absorber is a gas-charged suspension component designed to provide consistent damping and improved vehicle control for Ford F-250 Super Duty and F-350 Super Duty trucks. This shock absorber helps maintain tire contact with the road surface, reducing body roll and improving ride stability under load. The gas charge inside the shock absorber minimizes aeration and foaming, which can degrade performance over time. KYB's Gas-a-just line is known for delivering reliable shock absorber solutions that meet or exceed OEM specifications, making it a suitable replacement for worn or damaged shocks on these Ford Super Duty models.

Common Applications and Problem Solving

  • Restores handling and control in Ford F-250 Super Duty and F-350 Super Duty trucks
  • Reduces excessive bouncing and body roll during towing or hauling
  • Improves ride comfort on rough or uneven terrain
  • Addresses uneven tire wear caused by worn suspension components
  • Replaces leaking or damaged shock absorbers to maintain suspension integrity

Installation Notes and Tips

Installation of the KYB Gas-a-just 5540018 shock absorber should be performed with the vehicle securely lifted and supported. It is recommended to replace shocks in pairs to maintain balanced suspension performance. Ensure all mounting hardware is inspected and replaced if necessary. Proper torque specifications should be followed to avoid premature wear or failure. After installation, a wheel alignment check is advisable to ensure optimal handling characteristics.

Quality Assurance and Warranty

KYB manufactures the Gas-a-just 5540018 shock absorber to meet strict quality standards, ensuring durability and consistent performance. This part is designed to meet or exceed OEM requirements for Ford F-250 Super Duty and F-350 Super Duty trucks. Warranty coverage details should be confirmed with the product documentation or manufacturer, as they may vary by region.

This part fits 18 vehicles. Search below:

YearMakeModelBody TypeDrive TypePositionNotes
2022FordF-350 Super DutyCrew Cab Pickup4WDRearMonotube Performance Upgrade; Gas-a-just
2021FordF-350 Super DutyCrew Cab Pickup4WDRearMonotube Performance Upgrade; Gas-a-just
2020FordF-250 Super Duty4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2020FordF-350 Super DutyCrew Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2020FordF-350 Super DutyExtended Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2020FordF-350 Super DutyStandard Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2019FordF-250 Super Duty4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2019FordF-350 Super DutyCrew Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2019FordF-350 Super DutyExtended Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2019FordF-350 Super DutyStandard Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2018FordF-250 Super Duty4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2018FordF-350 Super DutyCrew Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2018FordF-350 Super DutyExtended Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2018FordF-350 Super DutyStandard Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2017FordF-250 Super Duty4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2017FordF-350 Super DutyCrew Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2017FordF-350 Super DutyExtended Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just
2017FordF-350 Super DutyStandard Cab Pickup4WDRearInstall a monotube shock absorber to enhance performance.; Gas-a-just

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

HC3Z18125ABHC3Z18125EBHC3Z18125EMHC3Z18125ENHC3Z18125RHC3Z18125SHC3Z18125THC3Z18125WLC3Z18125J

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.