June 06, 2018
All Over the Map: Attacking 4L60/E Burnt 3-4 Clutches with Confidence
Temporarily out of stock with no current restock date.
Input shaft failure is a common problem in GM 4L60 and 4L60-E units as power levels are increased. Sonnax heavy duty input shaft 77733-10S for 298mm torque converter 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.