[chewychevy67]

I had these parts removed from a 1967 Buick 400 transmission and I am going to add the. To my th400. These are the pieces required to allow your th400 to change the stall speed of your converter with 12 volts. Gm used this in 65 to 67 Buick old and cadillac 400 transmissions and can be adapted to chevy 400s with 8 bolt cases. It's pretty neat. I got my gear vendor unit as well so I can finish the transmission now.