Heavy Duty Input Shaft

The Sonnax Heavy Duty Input Shaft (PN 77733-11SB) is engineered to address input shaft failure in high-horsepower GM 4L60-E, 4L65-E, and 4L70-E transmissions. This robust component is constructed from high-strength steel, offering a significant upgrade over stock shafts, particularly in performance applications. This heavy-duty input shaft is specifically designed for units utilizing a 300mm torque converter and a non-reluctor style setup. Its primary benefit is its suitability for high-horsepower street or strip applications, where the stock input shaft is prone to failure. By reinforcing this critical component, Sonnax aims to enhance the durability and reliability of these transmissions under demanding conditions. The Sonnax 77733-11SB is part of a range of Smart-Tech components designed to optimize transmission performance and longevity. It is ideal for enthusiasts looking to push their GM vehicles beyond stock power levels with confidence in their drivetrain's ability to withstand increased torque and stress.