Tachometer Cable
CTPA-AR26721 Replacement Part to Fit:  John Deere "For Models: 3010, 3020, 3300, 4010, 4320, 4400, 4420, 4520, 4620, 6600, 4000, 4020, JD500, JD500A S/N <-123113, JD600" 33.5" LENGTH  Price:  $15.96  Buyers Club Price:  $14.36