Next up is the most Infamous part in a 700R4, The Reaction Sun Shell.
AC Delco sunshell (update) kit is the way to go for Stock to Mild builds up to 350 ft.lbs
Amazon.com: ACDelco 24243878 Reaction Sun Gear... Everything to "Rollerize" the Input planet Carrier.
Sonnax Smart-Shell is the next step-up in torque handling, As strong as any "High Risk" component in this unit. Making over 450 ft.lbs.? Rethink using a 700R4/4L60. Info
http://www.sonnax.com/landing_pages/smartshell Product
http://www.sonnax.com/parts/2454.
The Beast, Monsters, Lions, & Tigers are a waste....