Spindle (RH/LH) (SN 341000- > Straight Axle). PART NO: A-AR91150. Dim A (1)A - 15.312" Dim B (2)B - 1.375" Dim C (3)C - 1.625" Dim D (4)D - 1.250". . MODELS: John Deere TRACTOR: 2440 (SN 341000- > Straight Axle) John Deere TRACTOR: 2640 (SN 341000- > Straight Axle).