Modified vehicle transmission

A kit for modifying an original equipment (OE) vehicle automatic transmission, the OE transmission having a housing, an input shaft, a main shaft and a sun shaft, the kit comprising:

• a replacement forward piston housing;
• a replacement forward clutch hub and a replacement forward clutch;
• a replacement direct piston housing;
• a replacement direct clutch hub and a replacement direct clutch;
• a drum extending between and operably connecting the replacement forward piston housing and the replacement direct piston housing;
• and
• a replacement sprag shaft;
• wherein the replacement forward clutch hub and the replacement forward clutch and the replacement direct clutch hub and the replacement direct clutch are positioned between the replacement forward piston housing and the replacement direct piston housing, and wherein at least a portion of the replacement forward clutch and at least a portion of the replacement direct clutch are operably mounted to the drum;
• wherein the replacement forward piston housing and the replacement direct piston housing do not counter rotate relative to one another;
• and
• wherein the replacement direct clutch hub is splined to the replacement sprag shaft at an outside diameter of the replacement sprag shaft and the replacement sprag shaft is configured to be splined to the sun shaft at an inside diameter of the replacement sprag shaft.