Sonnax® 4L80E-LB1 - High Performance Automatic Transmission Line Pressure Booster Kit

High Performance Automatic Transmission Line Pressure Booster Kit (4L80E-LB1) by Sonnax®. Includes: Pressure Regulator Spring, O-Rings (2), Large Ratio Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive pressure increases as driving conditions become more demanding. The pressure regulator springs are approximately 10% stronger than OE and more conservative in impact than other aftermarket kit springs. Large ratio boost valves provide higher pressure incrementally and when it is needed the most. The combination of these springs and valves in a Sonnax kit gives you the best of both worlds: a modest pressure increase at the low end, with a high-end pressure that is equal to or greater than that of other aftermarket kit springs.

Includes

• Pressure Regulator Spring
• O-Rings (2)
• Large Ratio Boost Assembly

Features

• Achieve shorter shifts and increased torque capacity without creating low-speed harshness
• Improved band and clutch holding capacity for increased durability
• Progressive pressure increase as driving conditions become more demanding
• All the benefits of increased line pressure without overloading the pump at idle
• Simple and affordable drop-in solution with no special tools or reaming required

Sonnax® has been bringing superior-quality transmission and drivetrain components to the automotive aftermarket since 1978. The company has everything you need to remanufacture torque converters, rebuild automatic transmissions, upgrade driveshafts, and protect the driveline from over-torque damage. Headquartered in southern Vermont, Sonnax is one of the fastest-growing companies in the state, boasting state-of-the-art design, development, and inspection facilities. Sonnax also has technical development centers in California, Georgia, New Jersey, Missouri, and Wisconsin. The company consists of 250 employees who take great pride in the Sonnax name and strive to further the company’s reputation for excellent technical knowledge and customer dedication. As a leading supplier to the automotive aftermarket, Sonnax exports to more than 70 countries and supports emerging markets worldwide.