Rear 540 PTO shaft
CTPA-70231938 Replacement Part to Fit:  Allis-Chalmers For Models: D17, 170, 175, 180, 185 Replaces: 70229312. 6/6 Splines, 41.375" Long, 6 / 6 Splines, 41.375" Long  Price:  $247.95  Buyers Club Price:  $223.15