OEM Heavy-Duty Manual Transmission Gear Set & Splined Mainshaft

Built to original equipment manufacturer specifications, this OEM Transmission Gear Set & Mainshaft Assembly provides factory-grade precision, seamless gear engagement, and long-lasting mechanical durability. Precision-machined from high-strength forged steel and surface-hardened to meet strict OEM quality standards, this complete assembly guarantees direct-fit replacement and peak drivetrain performance without modification.

OEM Heavy-Duty Manual Transmission Gear Set & Splined Mainshaft

100% OEM Direct-Fit Compatibility: Engineered to exact factory tolerances and dimensions for flawless plug-and-play installation into original gearbox housings.

OEM-Grade Precision Tooth Profile: CNC-hobbed helical and spur gears deliver exact pitch alignment, drastically reducing backlash, gear whine, and mechanical wear.

High-Torque Factory Splined Mainshaft: Built with precision-machined splines that match original drivetrain specifications, ensuring maximum torque transfer without slippage.

Forged & Case-Hardened Steel: Manufactured using original equipment metallurgy and heat-treatment processes to prevent tooth shear, fatigue, and heavy-load pitting.

Factory-Spec Synchronizer Engagement: Features OEM synchronizer hubs and precision teeth for crisp, positive shift feel and dependable high-RPM transitions.

OEM Surface Protection: Treated with an oil-retentive dark oxide coating to optimize lubrication retention and protect against rust in severe operating environments.