The idea is that as the throttle opens, the line pressure in the transmission increases. The TV cable does that - at WOT, the cable should be fully extended, which puts maximum pressure in the trans. When the carb returns to idle, the cable retracts and pressure is reduced. If it's not adjusted correctly, pressure can be too low and you'll burn the clutches up in a hurry. The issue is that some instructions say to open to WOT, fully extend the cable, and attach the plastic detent at that point, locking it in place with the cable nut. Others say to leave the carb at idle position, make sure the cable adjusting sleeve is fully seated, and attach the detent and lock it in place without extending it. Then, open the throttle to WOT one time, and the adjustment sleeve will automatically extend out to the proper position. Every set of instructions is slightly different. Since I know next to nothing about automatics, I want to get it right.