Description
4L60E / 4L65E / 4L70E / 700R4 Smart Tech Input Housing Kit, 1982-2014, S74554ST / 77733-06KA.
The 4L60E / 4L65E / 4L70E / 700R4 Smart Tech Input Housing Kit Includes:
- PTFE Impregnated Rear Stator Support Bushing
- Modified Input Housing
- Input Drum Reinforcement Sleeve
- Overrun Piston Inner Seal
- Overrun Piston
- 3-4 Clutch Apply Plate
- 3-4 Clutch Return Springs (10)
- Bolt-on Anchor Plate
- Overrun Piston Outer Seal
- Socket Head Cap Screws (15)
The Sonnax Smart-Tech input housing kit addresses five weak areas of the input housing including: flexing/bowing of the 3-4 backing plate, limited 3-4 clutch torque capacity, 3-4 snap-ring blow-out, input housing breakage near the input shaft spline, and input housing fatigue failure.
The Sonnax heavy duty bolt-on anchoring plate eliminates flexing/bowing of OE and other aftermarket backing plates, and this unique design ensures even clamping of the 3-4 clutches in higher horsepower and higher pressure applications. By eliminating the 3-4 snap ring and using a thinner yet stiffer apply plate, space is made available for additional frictions and steels. Because of this, it makes it possible to simultaneously increase clutch torque capacity and eliminate the possibility of retaining ring blow-out. A steel reinforcement sleeve prevents breakage in the spline area, and housing fatigue failure resistance and housing life are significantly improved with a special treatment process that greatly reduces stress crack formation.
Features and benefits include:
- Zero-flex, bolt-on bolt-on anchor plate eliminates uneven clamping pressure, and results in increased clutch durability.
- Increased 3-4 clutch torque capacity will accept either:
- Eight .067″ frictions with seven .095″ steels
- Nine .062″ frictions with eight .077″ steels
- Eliminates snap-ring blow-out
- Treated housing is significantly more resistant to fatigue failure
- Includes steel reinforcement sleeve and overrun piston
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