Description

The CUSCO Reinforced Transmission Clutch Hub is a heavy-duty, competition-grade internal transmission component designed to eliminate a key weakness in the GR Yaris 6-speed manual gearbox. Manufactured from high-strength chromoly steel, this hub replaces the stock synchronizer hubs for 1st-2nd, 3rd-4th, and 5th-6th gears with a significantly more durable unit, engineered to withstand the extreme shock loads and power levels that can cause failure during aggressive shifting, high-RPM launches, and competitive use.

Product Highlights

🏗️ Chromoly Steel Construction for Ultimate Strength
Replaces the OEM cast or forged hubs with components machined from high-strength chromoly steel. This material offers superior tensile strength, fatigue resistance, and impact toughness, directly addressing failures common under high-stress conditions.

⚙️ Direct Replacement for 1-2, 3-4, and 5-6 Gear Sets
The kit includes three reinforced hubs, covering all three synchronizer assemblies in the 6-speed transmission (1-2 speed, 3-4 speed, and 5-6 speed). This provides comprehensive internal reinforcement.

🔧 Direct OEM Replacement – No Modification Required
Engineered to exact OEM dimensions as a direct, drop-in replacement for the factory clutch hubs. Installation requires full transmission disassembly and reassembly by a specialist, but no modification to the gearbox casing or other components is needed.

🏁 Designed Exclusively for Competition & High-Stress Use
This product is intended solely for competition vehicles (Time Attack, Rally, Circuit Racing, Drag Racing) or extremely high-powered street builds where the stock transmission components are a proven liability. It is a preventative and corrective measure for gearbox reliability.

⚠️ Competition Use Only – No Warranty
This product is for competition use only and is not covered by warranty. Its use in street-driven vehicles is not recommended due to potential changes in shift feel and noise, and it is sold with the understanding that it will be used in environments where failure of stock components is expected.

Technical Specifications

• Product: Reinforced Transmission Clutch Hub (Synchronizer Hub) Set

• Material: Chromoly Steel

• Contents: Hubs for 1-2 Speed, 3-4 Speed, and 5-6 Speed (Set of 3)

• Application: Direct OEM replacement

• Use: Competition only

• Warranty: None (Competition part)

Kit Information

• Product Code: 1C7-028-CB

• JAN Code: 4996338085795

Installation & Critical Usage Notes

🔧 Expert Transmission Rebuild Required
Installation is highly specialized and must be performed by a certified transmission builder or race shop. It requires complete disassembly of the transmission, precise measurement of gear clearances, and expert reassembly. This is not a DIY or typical mechanic job.

⚙️ Supporting Parts & Fluids
Installation typically requires new genuine synchronizer rings, bearings, seals, and gaskets. Use of a high-performance racing transmission fluid is mandatory.

🎯 The Ultimate Transmission Reliability Upgrade
This is the definitive solution for competitors experiencing or anticipating synchronizer hub failures. It is the strongest available replacement to handle high torque, aggressive flat-shifting, and brutal clutch engagement.