YUANTUO Hydro Boost Seal Repair Kit 2771004x for Ford/GM/Chrysler — Full Seal & Gasket Set Restores Hydraulic Boost

YUANTUO Hydro Boost Seal Repair Kit (2771004x) is a complete seal replacement set designed to restore hydraulic boost function on many Ford, GM and Chrysler brake systems.

When a hydro-boost unit leaks or loses pressure, replacing worn seals is often the most cost-effective fix. This repair kit supplies a full complement of seals and gaskets engineered to match the original Hydro-Boost design, allowing technicians and DIYers to overhaul Bendix-style and many other hydro boost units without buying a new assembly.

Which vehicles and assemblies is this repair kit compatible with?

The kit is built for broad fitment across popular Ford, GM and Chrysler models that used hydraulic brake boosters. It covers a long list of Super Duty trucks, vans and full-size SUVs as well as many Chevrolet truck platforms.

• Ford: F-150, F-250, F-350, F-450, F-550, Bronco, Expedition, Excursion, Fusion, Mustang
• Chevrolet: Silverado 1500/2500/3500, Silverado 1500 Classic, Tahoe, Traverse, Blazer, Astro, G30, S10, Express 1500
• Replaces OE reference numbers including 2771004x and 2771004 where applicable

How does the kit restore a leaking or weak hydro-boost unit?

The repair kit contains all necessary hydraulic seals to remove degraded rubber components and reinstall fresh ones, reestablishing internal pressure and stopping external leaks. Properly replacing these parts often brings back pedal feel and hydraulic assist without replacing the entire booster.

• Complete seal set for internal pressurization and external leak points
• Designed to match Bendix-style hydro-boost geometry
• Replaces worn or cracked O-rings, cups, and gaskets that cause loss of assist

Is installation difficult and what tools or steps are needed?

Installation is straightforward for a mechanically competent technician or experienced DIYer. The kit is a direct seal replacement—parts are plug-and-play—but the job requires disassembly of the booster, careful cleaning, and correct seal placement to ensure reliable operation.

• Requires disassembly of the hydro-boost housing and piston components
• Clean surfaces, inspect metal parts, replace seals in original orientation
• Torque fasteners per factory specs and bleed hydraulic system after reassembly

What’s included in the package and what should you inspect during repair?

The package contains a full hydraulic boost seal kit—every seal you’ll need to refresh the internal and external sealing points of the unit. While seals fix most leaks, inspecting internal bores, pistons and mating surfaces for scoring or corrosion helps determine if a full booster replacement is necessary.

• One complete Hydraulic Boost Seal Repair Kit from YUANTUO
• Seals sized to replace OE 2771004/2771004x components
• Inspect for scored bores, rust, or damaged pistons before final reassembly

Who this is for: This YUANTUO hydro boost seal repair kit is aimed at fleet mechanics, independent shops, and knowledgeable DIYers who need a reliable and economical way to stop hydro-boost leaks and restore brake assist on compatible Ford, GM and Chrysler vehicles. Choose this kit when seals are the source of failure and you want a complete, OEM-style replacement set to reuse the existing booster housing.