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Model B final drive question.
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Tcfcowboy View Drop Down
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Joined: 13 Feb 2025
Location: Tyrone
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tcfcowboy Quote  Post ReplyReply Direct Link To This Post Topic: Model B final drive question.
    Posted: 13 Feb 2025 at 7:30pm
I have a 1938 B that I m currently restoring, the right final drive is cracked around the drawbar. Would final drive from a 1940 B work. The reason I ask is, someone told me the early models had a different final drive, however they look the same to me.
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 85641 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2025 at 7:56pm
Should interchange fine... Some have said the gear ratio is slightly different.. I can not confirm that... The housing would definitely be the same... The draw bar mounting holes on the earlier tractors were 1/2 inch i believe, and the later were 5/8 inch.
Like them all, but love the "B"s.
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wjohn View Drop Down
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Joined: 19 Jan 2010
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Points: 2158 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wjohn Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2025 at 8:15pm
I have heard that there were some different final ratios over the course of production as well, and I would love to see conclusive info on that. I have found several different ground speed ranges given depending on the year of the sales literature.
1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
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Points: 85641 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2025 at 8:20pm
I just looked up in the PARTS book and they list ONE bull gear for the B... but a couple options for the C.... As John said, the ground speed seemed to change over the years and SOME have said this is due to the final drive ratio.... I tend to think it is more related to the TIRE SIZE and GOVERNOR speed which changed over the years...
Like them all, but love the "B"s.
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Tcfcowboy View Drop Down
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Joined: 13 Feb 2025
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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tcfcowboy Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2025 at 6:51am
Ok thanks, I’ll count the teeth, and check the size of the bull gear.
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