Hy Guys, okay I am going to wade into this discussion. To answer the question about the differences between the two part numbers quoted, 518050 has 5/16" inlet and outlet hydraulic ports inverted flare and the unit is 18 3/4" overall length the cylinder is 12 3/4" in diameter. 518016 has a 1/4" inverted flare inlet port and a 5/16" inverted flare output hydraulic port, the unit is 16" overall length and the cylinder is 11" in diameter. DIY.MechanicMike which set of specifications better match what is on the truck now, if neither match please give us the specifications of what you have now. Hope this helps.
