Propeller Shaft Phasing (1971-74 Chev. & GMC "G" & "P" Models With Two-Piece Driveline & 1972 C-30 & C-3500 W/307" Engine & 157" Wheelbase)

If components have been disassembled, reassemble using following procedure: Install front shaft and center bearing. Rotate shaft so that universal joint is in vertical position. Before installing rear shaft, rotate it so universal joints are vertical. Note position of splines at slip joint and rotate rear shaft four splines (C-10, two splines) toward left side of vehicle. Assemble slip joint and rear universal joint.

NOTE: In certain cases, splines on slip joint are not uniform in width. This will match non-uniform pattern in female part of joint and allow for assembly in only one position. If flanges are not in phase after assembly, assembly is correct as long as parts were mated properly.