Last week I heard a knocking sound from the driveline as I turned the rear wheel by hand. After reading countless stories of u-joint failures I figured it was my turn to face the inevitable. I removed the driveshaft to properly inspect the u-joints The trunnions attached to the fixed yoke were very stiff, not moving freely like the splined yoke. They also had grease weeping from the seals. It takes a bit of patience to seperate these little pieces. Eventually I managed get them apart The end of one of the trunnions is discolored, likely from excessive heat.