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.

Increases input housing torque capacity
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

More From This Category

Sonnax RFE Transducer Connector, Chrysler, 45/545/65/66/68RFE, Each

Sonnax RFE Transducer Connector, Chrysler, 45/545/65/66/68RFE, Each

$57.70

Sonnax 10-Clutch Drum Kit, GM, Powerglide, Each

Sonnax 10-Clutch Drum Kit, GM, Powerglide, Each

$784.82

Sonnax Tool Kit, Ford, AOD/E, 4R70E/W, 4R75E/W, 4L30E, Each

Sonnax Tool Kit, Ford, AOD/E, 4R70E/W, 4R75E/W, 4L30E, Each

$2,871.44

Sonnax Reverse Servo Spacer Kit, GM 4L80-E, 4L85-E, Each

Sonnax Reverse Servo Spacer Kit, GM 4L80-E, 4L85-E, Each

$27.08

Sonnax Friction Ring, Chrysler, 9.625in. X 7.625in. X .066", Htl Material, Each

Sonnax Friction Ring, Chrysler, 9.625in. X 7.625in. X .066", Htl Material, Each

$25.28