Hello members  Helping a friend find parts for 56 thunderbird T-85 OD trans. Needs a  speedometer DRIVE gear. Ford part number is MC-17285-A.  . This gear was also used in 55-56 merc with T-85 OD (IP-17285-B) and 55-56 ford with auto trans. Thinking maybe someone with a 55 or 56 ford-o-matic parts trans might have one for sale. I have seen them  in both nylon and steel, 8 tooth left helix . I believe  steel drive gears are destroyed by using wrong OD governor or lack of lube. Thanks.