In Reply to: rear end center housing question for the experts! posted by chris eby on July 04, 2018 at 19:18:15:
Iím unsure on the dates, but there were some very early models that the rear end top link boss was added on as a separate piece. The foundry then had new patterns made where the boss was cast onto the rear case all in one. You can tell by the sharp corners on the early one and on the smooth blended radii on the later ones. Here are some pix. My late 1939 *9N-653I* rear end the blue one. Hope this helps.
EARLY 1939 FORD-FERGUSON 9N REAR END:
LATE 1939 FORD-FERGUSON 9N CAST REAR END: