Got a T5 transmission that's grinding gears, especially between 3rd and 4th? This Borg Warner T5 World Class synchro assembly kit is your fix. It's brand new, designed specifically for the 3-4 shift, and part number T5-2.5a (interchange 1352-590-011). Perfect for rebuilds, upgrades, or just fixing a worn-out synchro. From Transolutions, a solid aftermarket brand. Whether you're restoring a classic Mustang, Camaro, or any vehicle with a T5, this kit helps ensure smooth, crisp shifts. Includes all the necessary components for a professional-quality repair. Stop grinding and start driving smoothly. A key part for any T5 transmission rebuild project.