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

ARP Bolts, 8740 Chromoly, Black Oxide, 12-Point Head, 12mm x 1.75 Thread, 60mm UHL, Set of 5

ARP Bolts, 8740 Chromoly, Black Oxide, 12-Point Head, 12mm x 1.75 Thread, 60mm UHL, Set of 5

$52.50

ARP Cylinder Head Stud, Pro-Series, 12-point Head, BMC/Triumph, 2.0L GT6 & 2.5L TR6, Kit

ARP Cylinder Head Stud, Pro-Series, 12-point Head, BMC/Triumph, 2.0L GT6 & 2.5L TR6, Kit

$234.95

ARP Valve Cover Bolts, Chromoly, Black Oxide, Hex Head, 6mm x 1.0 Thread, For Chrysler, For Dodge, Ram, 5.7L, 6.1L, Set of 20

ARP Valve Cover Bolts, Chromoly, Black Oxide, Hex Head, 6mm x 1.0 Thread, For Chrysler, For Dodge, Ram, 5.7L, 6.1L, Set of 20

$82.35

Dakota Digital Gauge Kit, Analog/Digital, Black Background, Multicolour Display, 1973- 87 For Chevrolet Pickup, Kit

Dakota Digital Gauge Kit, Analog/Digital, Black Background, Multicolour Display, 1973- 87 For Chevrolet Pickup, Kit

$3,287.76

GM Performance Cam Gear, 3-Bolt, 58/4X, Chevy, V8, LS, Each

GM Performance Cam Gear, 3-Bolt, 58/4X, Chevy, V8, LS, Each

$62.35

ICON Piston, 4 in. Bore, 1/16, 1/16, 3/16 in. Ring Grooves, For Ford 347 Rod 5.400 Step Dish +16.5cc 2V, .STD Oversized, w/ Rings, Each

ICON Piston, 4 in. Bore, 1/16, 1/16, 3/16 in. Ring Grooves, For Ford 347 Rod 5.400 Step Dish +16.5cc 2V, .STD Oversized, w/ Rings, Each

$1,786.41