Temporarily out of stock with no current restock date.

4L60-E, 4L65-E, 4L70-E

Heavy Duty Input Shaft
Part No. 77733-11S

TEMPORARILY OUT OF STOCK. For units with 300mm converter, non-reluctor style shaft

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Input shaft failure is a common problem in GM 4L60-E, 4L65-E and 4L70-E units as power levels are increased. Sonnax heavy duty input shaft 77773-11S for 300mm non-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
  • 4L60-E, 4L65-E, 4L70-E Heavy Duty Input Shaft 77733-11S


Harness that Horsepower! Your Guide to a Sonnax 4L60/E Level 3 Performance Build