Sunsong 3402105 Power Steering Pressure Line Hose Assembly

Power Steering Pressure Line for Saginaw Gear

Sunsong 3402105 is a power steering pressure line hose assembly built for select Ford and Mercury applications with Saginaw steering gear. It is engineered for direct-fit replacement on vehicles such as the 1977 Ford Thunderbird and 1977 Mercury Cougar, as well as earlier Mercury Cougar and Montego models listed below.

• Max working pressure: 1,500 psi
• Burst pressure rating: 8,700 psi
• Tensile strength: 1,600 lb
• High-grade steel tubing with zinc electroplating for corrosion resistance
• Precision-engineered fit for original routing and connection points
• End fittings: 5/8 in female and 11/16 in male inverted flare
• Hose length: 39.3 in (998 mm)
• CSM hose material for pressure-line service

Detailed Product Overview

This Sunsong power steering pressure line hose assembly is built to restore steering fluid transfer between the pump and steering gear on compatible Ford and Mercury vehicles. Part number 3402105 is manufactured to exceed original equipment performance standards, with pressure capacity and material strength selected for demanding steering-system use. The steel tubing is zinc coated to help resist rust and corrosion from humidity, road salt, water, and grime, while the hose assembly is precision formed for proper fitment on the listed Saginaw steering gear applications.

This part cross-references Dayco 70704 and Gates 354290 for the same application. Use 3402105 when replacing a worn, leaking, or damaged pressure line on a 1977 Ford Thunderbird, 1977 Mercury Cougar, or the specified Mercury Cougar and Montego configurations.

Vehicle Fitment

• Fits 1977 Ford Thunderbird, w/ Saginaw Steering Gear
• Fits 1977 Mercury Cougar, w/ Saginaw Steering Gear
• Fits 1974-1976 Mercury Cougar, w/ 4 Bolt Housing, w/ Saginaw Steering Gear
• Fits 1974 Mercury Cougar, w/ Saginaw Stg. Gear, w/ 4-Bolt Housing
• Fits 1973-1976 Mercury Montego, w/ Saginaw Steering Gear
• Fits 1974 Mercury Cougar

Common Replacement Issues

• Power steering fluid leaks from a cracked or fatigued pressure hose
• Steering noise caused by pressure loss in the hydraulic circuit
• Corrosion-related failure on steel tubing exposed to road salt and moisture
• Poor steering assist from restricted or damaged hose flow
• Fitment problems when replacing an incorrect or worn original line

Installation Notes and Tips

Confirm steering gear type and housing configuration before installation, since this hose is listed for Saginaw steering gear applications and specific 4-bolt housing notes. Verify both end fitting sizes and routing length against the original line before tightening connections. After installation, inspect the system for leaks and bleed the power steering system according to the vehicle service procedure.

Quality Assurance

Each Sunsong 3402105 hose is pressure tested before it leaves the factory to help ensure proper operation after installation. The assembly is built to meet demanding pressure requirements and is designed for long service life in steering-system use.