Input shaft failure is a common problem in GM 4L60-E, 4L65-E, 4L70-E units as power levels are increased. Sonnax heavy duty input shaft 77733-12S for 300mm reluctor-style units is ideal for any high-horsepower street or strip application. The shaft is manufactured from a specially heat-treated steel with very hard outer layers and a more ductile inner core for strength and resistance to fracture. The feedholes are chamfered to reduce stress, and the shaft is further processed by shot peening and deep cryogenic treatment.

High-strength steel ideal for high performance applications
Shot peened and cryogenically treated for extreme durability
Unique design protects against failure from stress cracks

More From This Category

Sonnax Primary Pulley Bearing, JF011E (Re0F10A), 101X60X17, Each

Sonnax Primary Pulley Bearing, JF011E (Re0F10A), 101X60X17, Each

$84.37

Motive Gear Differential Master Bearing Kit, Koyo, For CHEVROLET BLAZER 1969–1974, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For CHEVROLET BLAZER 1969–1974, Kit

$160.85

TCI Bearing Replacement For Ford C-6 Low Drag Planetary Set

TCI Bearing Replacement For Ford C-6 Low Drag Planetary Set

$374.72

TCI Tailshaft Housing, Aluminum, GM, TH400, Each

TCI Tailshaft Housing, Aluminum, GM, TH400, Each

$603.15

Motive Gear Axle Shaft, 1541 Manganese, 5x4.75 in. Bolt Pattern, 27.25 in. Length, 31SPL, ForD BRONCO 1966–1975, Each

Motive Gear Axle Shaft, 1541 Manganese, 5x4.75 in. Bolt Pattern, 27.25 in. Length, 31SPL, ForD BRONCO 1966–1975, Each

$244.78