Loading the drivetrain for the f of it can give you some sounds. Since you are doing this enough to get some reasonable info, please get more. Is the motor mount shot, full of oil and moving/grinding when you load it up? Is a motor mount nut missing and the sound you hear the stud pulling in and out of the subframe? Is the axle making the noise. Jack and support the car. Turn the wheel back and forth by hand.. there will be some play side to side but does anything feel bad or sound bad?