Shifter control repair kit contains, 398300R1 arm, 380115R2 roller, 398304R1 spring. Tractors: 766 after s/n 17047, 966 after s/n 32222, 1066 after s/n 57646, 1466 after s/n 30001 all 1566, 786, 886, 1086, 1486, 1586, 3088 thru 3788 6388 thru 6788.