TCI 4L60E LS 300M Input/HD Drum w/o Sunshell

Eliminate concerns of input shaft and drum breakage in high performance applications with these HD Shaft & Drum Assemblies.  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. In addition, a Beast sunshell (where applicable) stops any chance of sunshell breakage. This combination of highly durable components makes these assemblies the ultimate upgrade for virtually any high horsepower applications that use 700R4 or 4L60E transmissions.