Real HP loss numbers

[A70Duster at aol.com]

Was wondering (induced by all the talk with computers recording spark signals
and computing HP) what are the actually losses in drivetrain.  I've heard the
torque converter is 97% efficient at part throttle and 2 hp at U-joints (I
don't believe, that's 1500 Watts at each joint).  Looking at tranny (auto and
standard) u-joints, ring and pinion, bearings, spider gears, axles....

Sorry, it's off the beaten path, oh well    :)

Mike