77733-52K

Input Housing Forward Sleeve Kit
Requires Sonnax overrun sleeve and compatible overrun piston. See instructions for details.

Input housing failure at the shaft and forward piston areas is common in high-torque 4L60, 4L60-E, 4L65-E and 4L70-E transmissions. Sonnax input housing forward sleeve kit 77733-52K is used in combination with a Sonnax overrun sleeve to greatly increase the maximum strength of the housing and prevent these failures.

Installation of an overrun sleeve — available with Sonnax input housing overrun sleeve kit 77733-51KA and Smart-Tech input housing kits — is a common durability upgrade in these units. Even with an overrun sleeve, though, a large portion of the input shaft and aluminum housing spline connection remains unsupported. Adding the Sonnax forward sleeve kit nearly doubles support in this area, making it a recommended component for all high torque capacity work/sport vehicles.

• High-strength, chromoly steel sleeve increases input housing torque capacity by protecting the shaft and forward piston areas
• Maintains OE forward piston apply area
• Combine with a Sonnax overrun sleeve for easy upgrades of older builds or new heavy-duty/high performance builds

Contents

• Forward Piston
• Forward Reinforcement Sleeve
• Outer Forward Piston Seal
• Inner Forward Piston Seal
• Forward Piston Housing