4L60-E / 4L65-E / 4L70-E

Heavy Duty Input Shaft
Part No. 77733-11S

Fits 300mm non-reluctor style units only

Input shaft failure is a common issue in GM 4L60-E, 4L65-E, and 4L70-E transmissions when power levels are increased. The Sonnax heavy duty input shaft (77733-11S) is engineered specifically for 300mm non-reluctor style units and is ideal for high-horsepower street or strip builds.

Crafted from specially heat-treated steel, this shaft features a hard outer layer for wear resistance and a ductile inner core to prevent fracture. Chamfered feed holes reduce stress concentrations, while shot peening and deep cryogenic treatment enhance durability under extreme conditions.

• High-strength steel ideal for high-performance applications
• Shot peened and cryogenically treated for extreme durability
• Unique design protects against failure from stress cracks