USA Standard Gear ZMZFS6-2.5 Manual Transmission 3rd & 4th Synchronizer Hub Slider 6-Speed ZF S6-650

The USA Standard Gear ZMZFS6-2.5 is a replacement 3rd and 4th gear synchronizer hub and slider assembly designed specifically for ZF S6-650 and S6-750 6-speed manual transmissions. This critical transmission component plays an essential role in synchronizing gear speeds during shifting, preventing grinding and ensuring smooth transitions between 3rd and 4th gears.

Key Features:

• Direct replacement synchronizer hub and slider assembly for 3rd and 4th gears
• Designed for ZF S6-650 and S6-750 heavy-duty 6-speed manual transmissions
• Compatible with 1998-up Ford Super Duty and 2001-up GM heavy-duty truck applications
• Manufactured to meet or exceed OEM specifications for reliable performance
• Essential component for transmission rebuilds and repairs

The ZF S6-650 transmission is a heavy-duty unit rated to handle up to 520 lb-ft of torque and was used in Ford and GM pickup trucks with diesel and gasoline engines. This synchronizer assembly is a critical wear item that may need replacement during transmission overhaul or when experiencing shifting difficulties. USA Standard Gear manufactures a complete line of transmission components to support professional rebuilds and DIY transmission repairs.