Remove the brake rods from the cross shaft, remove the four bolts holding the ball cap collar to the rear of the transmission, jack up & block up the frame just forward of the rear radius rods, remove both rear spring shackles, roll the entire rear axle assembly back far enough to have clear access (or roll it out from under the car) for u-joint removal, remove the upper & lower u-joint pin access plugs, locate & drive out the u-joint pin, remove & replace the u-joint. Re-assemble in reverse order.