Be sure the weight of the vehicle is supported by the frame, NOT the rear axle tubes. Weight on the springs can, and usually does cause the torque tube to slam down as the U joint is disconnected. This happened to a friend back in high school, and one jack stand slipped out of position, pinning him under the vehicle. Only minor injuries resulted, but it took three people to lift the vehicle enough to get him out from under it. It's also a lot easier to slide the pivot ball back with no load on the torque tube.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!