Revolution Gear and Axle, Replacement series, Rear axle shaft for GM 8.5 Inch 88-98 1500 4WD w/IFS front, fits both Left and Right side, 33 Inch 30 Spline (OE# 26010416 / Hollander# 447-1671). Revolution replacement series axles are made from 1541H Steel and utilize a state of the art computer controlled heat treated process. The use of better material and better heat treating process gives our replacement axles a 10 Percent increase over the OEM axles.