Sunsong 3404139 Power Steering Pressure Line Hose Assembly - Hydroboost To Gear

Power Steering Pressure Line for Ram HD

This Sunsong power steering pressure line hose assembly is built for 2013-2019 Ram 2500 and 2013-2019 Ram 3500 applications with hydroboost to gear routing. Part number 3404139 is engineered for direct replacement service, with OE-style fitment and pressure capacity suited to demanding steering systems.

Key Features

• Fits 2013-2019 Ram 2500, hydroboost to gear
• Fits 2013-2019 Ram 3500, hydroboost to gear
• Male O-ring fittings: 16 mm end 1 and 18 mm end 2
• 51 in. overall length for the specified steering layout
• CSM hose material for durability in power steering service
• Max working pressure rated at 1,500 psi
• Burst pressure rating of 8,700 psi
• Tensile strength rated at 1,600 lb
• High-grade steel tubing with zinc electroplating for corrosion resistance

Detailed Description

Sunsong 3404139 is a power steering pressure line hose assembly for Ram HD trucks with hydroboost to gear routing. It is built to meet or exceed original equipment performance standards and uses precision-engineered dimensions for the listed Ram 2500 and Ram 3500 fitments. The hose assembly is designed with male O-ring ends, 16 mm at one end and 18 mm at the other, to match the specified steering connection points.

Construction details focus on durability in harsh underbody conditions. The steel tubing is zinc electroplated to help resist rust and corrosion from humidity, road salt, water, and grime. This part number 3404139 also carries pressure and strength ratings that support demanding steering-system operation in heavy-duty Ram applications.

This part cross-references Monroe Shocks & Struts (e.g., 5540) for the same application.

Common Problems This Part Can Address

• Power steering fluid leaks at the pressure line
• Cracked or fatigued hose material from age and heat exposure
• Corrosion on steel tubing and fittings
• Steering noise or loss of hydraulic assist caused by line failure
• Improper routing or fitment after a previous repair

Installation Notes and Tips

Verify the vehicle uses hydroboost to gear routing before ordering. Confirm the 16 mm and 18 mm male O-ring connections match the original line, and inspect adjacent seals, brackets, and mounting points during replacement. Clean the connection surfaces before installation and check for leaks after the system is filled and bled.

Quality Assurance

Each Sunsong pressure hose is pressure tested before it leaves the factory to help ensure consistent operation and straightforward installation. The part is engineered to restore the steering line to original-condition service for the listed Ram 2500 and Ram 3500 applications.