BEAST SHELL, 700R4/4L60E, REACTION SHELL, 1982-UP THE BEAST, 4 HOLES
700R4 / 4L60E Extreme Duty “The Beast” reaction shell. Redesigned sun gear shell for the 700R4 / 4L60E transmission by strengthening and reinforcing the neck collar spline area using thicker material. Known for loosing reverse, 2nd and 4th gears the 700R4 sun gear shell has a very high fatigue failure rate. This is the shell you want to install in a 700R4 that’s behind a 300 plus horse power motor. This part holds in 2nd, 4th and reverse.