Eliminate input shaft and drum breakage in high performance applications. The input shafts are made from a heat-treated, billet 300M material with a high yield strength that resists breakage and results in less shaft twisting than OEM material. Rolled splines increase the strength and density of the material in the splined areas; rather than removing material, the splines are actually compacted, which causes the material to be more dense in this area. The sleeved drum is made from ultra-strong 4130 steel for superior strength and durability, and a SmartShell (where applicable) stops any chance of sunshell breakage.
4L60E Ls 300M Input/Hd Drum