However, there are some late JD450B's out there with wet steering clutches. Also, the JD450C changed from dry to wet steering clutches. The main differences between the JD450B and JD450C are that the C went to a 4/219 CID Turbocharged engine from the 4/219 CID normally aspirated engine in the JD450B. We do not know the exact serial number of the last JD450B as a result.
There is an overlap in 1975 thru 1976 where JD450B and 450C models were made concurrently. Here are the serial numbers, by year, for the JD450 through JD450G models.
