Eaton Fuller Fuller Synchronized Boosted 6 Speed Model: FS-5406A Serial: G0112666 Part Number: TA-C15-034260 Cust Part Number: YC35 7003 HB FS-5406A & FS-6406A: Left and right sides operate off 5th speed countershaft gear. 38-tooth gear, 6.35 pitch, 22° Helix Angle, 20° Pressure Angle Lbs.-Ft Max TQ: 560 [759 Nm] Ratio Rev: 8.63 1st: 9.01 2nd: 5.27 3rd: 3.22 4th: 2.04 5th: 1.36 6th: 1