Sonnax 77733-10KA Smart-Tech Input Housing Kit with Heavy-Duty Input Shaft

The Sonnax 77733-10KA Smart-Tech input housing kit with heavy-duty input shaft is built for 4L60 series automatic transmissions. It is designed to stop 3-4 clutch burnup. The housing has room for a taller clutch pack. A stronger backing plate holds the pack in place, which increases clutch capacity and helps protect against heat damage. This kit is for 298 mm converter units with a 30-spline input shaft.

Key Features:

• Redesigned 3-4 clutch apply plate allows thicker steels and more clutch options for greater torque capacity
• Accepts either (8) .067 in. frictions with (7) .095 in. steels, or (9) .062 in. frictions with (8) .077 in. steels
• Bolt-on anchor plate resists 3-4 backing plate flex and distortion
• Anchor plate is secured with 15 socket head cap screws. It replaces the OE retaining ring, which removes the risk of retaining ring blow-out
• Treated housing resists fatigue failure
• Reinforced sleeve in the steel input drum helps prevent breakage in the shaft and spline area
• PTFE-impregnated rear stator support bushing
• Heavy-duty 298 mm input shaft is built from high-strength steel. It is heat-treated, shot peened and deep cryogenically treated

Kit Contents:

• Modified Smart-Tech input housing with heavy-duty input shaft assembly
• Bolt-on anchor plate
• 3-4 clutch apply plate
• (10) 3-4 clutch return springs
• Overrun piston with inner and outer seals
• PTFE-impregnated rear stator support bushing
• (15) socket head cap screws