Please verify your model is listed below for correct fitment. This is the 8mm spring hole model. The pin on the body of the cylinder must be 8mm for this cylinder to be compatible. Fits Below Models: This steering cylinder is not compatible if your model uses part number AM123017. Fits 2 Wheel Steer Lawnmowers Compatible With John Deere 425 - Serial Numbers Before 051999 Compatible With John Deere 445 - Serial Numbers Before 051045 Compatible With John Deere 455 - Serial Numbers Before 050089.