This is a A-534120R91 Shaft, Gear Shift, Cross PN: 534120R91Main Description As Following : A-534120R91 Shaft, Gear Shift, Cross P.N: 534120R91 Length: 14.500"Pin Diameter: 1.125" Across PinsPin Size: (Square) .312"Shaft Diameter: .750" Found in Section & Models : Transmission & Rear Axle > Trans Related Parts, Case-IH INDUSTRIAL/CONSTRUCTION: 2544 (SN 14519->), Case-IH INDUSTRIAL/CONSTRUCTION: 2656 (SN 45579->), Case-IH TRACTOR: 544 (SN 14519->), Case-IH TRACTOR: 656 (SN 45579->), Case-IH TRACTOR: 666 Associated Items : New Also This is An Aftermarket Product And : Length: 14.500" Pin Diameter: 1.125" Across Pins Pin Size: (Square) .312" Shaft Diameter: .750"