This ZF 1358 304 256 mainshaft sliding sleeve is a core component for gear shifting in 12-speed AMT transmissions.

Adopting high-strength alloy forging and precision CNC machining, its internal splines and external gear sleeve are manufactured to strict OEM tolerance standards. It achieves zero-clearance meshing with the mainshaft and gears, delivering quick shift response without stagnation.

The surface undergoes special hardening treatment for outstanding wear and impact resistance, enduring continuous friction from frequent gear shifts and resisting deformation and wear during long-term operation.

With factory-level dimensional accuracy, it perfectly matches other components after installation, effectively eliminating shift noise and jamming, and ensuring smooth and reliable transmission shifting performance.