Collection: Heavy Duty Transmission Parts

When it comes to strength, durability, and performance under pressure, our Heavy-Duty Transmission Parts Collection delivers. Built for high-torque, towing, diesel, racing, and off-road applications, these parts are designed to outperform OEM components and withstand the most demanding conditions.

This lineup includes heavy-duty clutches, steels, bands, valve body components, billet shafts, servos, accumulators, seals, gaskets, and complete rebuild kits—engineered for superior heat resistance, holding power, and hydraulic stability. Each part is precision-machined and performance-tested to ensure consistent operation even under extreme loads.

Whether you’re upgrading a 68RFE, 4L80E, 6L80, 10R80, 5R110W, or 4R70W, you’ll find the best heavy-duty and performance options available. Our collection features top-tier brands like Sonnax, Raybestos GPZ, Alto Red Eagle, and TransGo, trusted by professional transmission builders across the industry.

From Kevlar and carbon bands to billet input shafts and performance clutch kits, every component is built to extend service life, increase torque capacity, and keep your transmission running cool under pressure.