Keep your Ram's rear end planted under load with the KYB Gas-a-just Shock Absorber (MPN 5540020), a high-pressure monotube gas shock built as a direct-fit rear replacement for the 2007-2010 DODGE RAM 3500 and the 2014-2025 RAM 2500 (see the Buyer's Guide tab for engine-level fitment). Its components and valving are designed specifically for Rams, with added damping over the OE design for trucks that work, tow, and run larger, heavier tires and wheels.
- High-pressure monotube design: separates the gas and oil for fade-free operation and instant response, rather than the traditional twin-tube layout.
- Two working chambers: an air-free hydraulic piston and valve area for control, plus a high-pressure nitrogen gas area with a floating piston for a comfortable ride during normal driving.
- Triple chrome-plated piston rod: an ultra-smooth rod helps reduce seal wear, since fluid leaking can be a cause of shock failure.
- Up to 25% more damping over original-equipment shocks, and its higher gas pressure is designed to improve steering response.
Electronic safety systems depend on the suspension, brakes, and tires working as the manufacturer intended; the Gas-a-just helps keep those systems performing as designed. Sold individually; order two to replace both rear shocks together.
Interchange: 5189389AC · 5189389AD · 68233895AC · 68233906AD · 68245526AA
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicles does this KYB 5540020 shock fit?
It's a rear-position direct-fit for the 2007-2010 DODGE RAM 3500 and 2014-2025 RAM 2500. Check the Buyer's Guide tab to confirm engine-level fitment for your truck.
Is this a monotube or twin-tube shock?
It's a high-pressure monotube gas design. The monotube layout separates the gas and oil for fade-free operation and instant response versus a traditional twin-tube shock.
Does it help with towing and heavier tires?
Yes. The Gas-a-just includes added damping over the OE design for Rams that work, tow, and run larger, heavier tires and wheels, and adds up to 25% more damping over OE shocks.
Do I need to replace both rear shocks?
This listing is for one shock, sold individually. Replacing both rear shocks together as a pair is recommended for balanced, even ride control.
What are signs this shock may need replacing?
Fluid leaking, excessive bouncing, poor ride control, or reduced steering response can indicate a worn shock. Diagnose the cause before replacing to confirm the shock is the issue.
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