These units use a large 9-notch spanner nut to retain the drive sprocket to the output planet. As we know, adhering to torque specs of any driveline parts is critical to the survival of components. Toyota engineers require this nut to be tightened to exactly 207 lbs-ft. Nearly impossible to attain that setting by “feel.”
As an added feature, this new socket will also remove the nut retaining the underdrive planet/park gear/pinion (also tighten to 207 lbs-ft).
T-2700AC by ADAPT-A-CASE pictured in the background, spanner and hex nuts for reference.