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Tombold 
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Joined: 28 Dec 2023
Location: Seward Nebraska
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 Topic: Wd ring and pinion ratio
Posted: 29 Dec 2023 at 11:10am |
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I have a wd with 5:14-1 ratio
7 tooth pinion 36 ring.
My research says a standard wd is 3:58-1. 12-43 ring and pinion. It is a 52 wd78606.
What is the standard ratio?
Edited by Tombold - 29 Dec 2023 at 2:06pm
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Posted: 29 Dec 2023 at 11:39am |
hmm, all I know is that a 6 volt( early) D-14 has a different set of gears than a 12 volt (later) D-14. maybe one of the online parts places have the 'numbers' ??
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
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DrAllis
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Posted: 29 Dec 2023 at 12:27pm |
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I've got the actual gear numbers at home. WD45 gas is 3.3 to 1........old WD is 3.6 to 1........D-17/WD45 diesel is 3.9 to 1. I have heard of a "corn picker" transmission for old WD's, but never seen one. A better idea would have been boost the engine HP, put a larger sprocket on the PTO shaft and throttle the engine back a little keeping the same gear ratios.
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Ed (Ont)
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Posted: 29 Dec 2023 at 2:02pm |
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Make sure you count it a couple times as it is very easy to miscount. Not inferring that you can't. count. 46 ring and 7 pinion is 6.57 ratio. 12:43 is 3.58 as you said.
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Tombold
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Posted: 29 Dec 2023 at 2:11pm |
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Fat fingers ment 36 tooth ring gear. Stamped on it. 5:14 ratio. I have heard of cornpicker gears back seems like Noone knows.
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Tombold
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Posted: 29 Dec 2023 at 2:13pm |
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Fat finger. 36 tooth
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Ed (Ont)
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Posted: 29 Dec 2023 at 2:14pm |
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Yes that’s better.
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Tombold
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Posted: 29 Dec 2023 at 2:34pm |
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Is 3:58-1 standard wd?
12-43 count?
Noone has gave me a correct answer.
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Ed (Ont)
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Posted: 29 Dec 2023 at 2:50pm |
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My service manual says 3.5 to 1 for WD and 3.3 to 1 for WD45. Does not have tooth count or at least I haven't found it. And that is how they list it. Do not give the 2nd decimal place. So sounds like that 12 to 43 should be the one for the WD.
Edited by Ed (Ont) - 29 Dec 2023 at 3:23pm
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DrAllis
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Posted: 29 Dec 2023 at 3:56pm |
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Old WD's are 12 x 43. WD45 gas are 13 x 43. D-17/WD45 diesel are 9 x 35. I would calculate instead of low gear being 2.50 MPH it would be 1.63 MPH with a 5.15 R & P.
Edited by DrAllis - 29 Dec 2023 at 4:09pm
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Tombold
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Posted: 29 Dec 2023 at 4:26pm |
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I have 38" wheels on it and in high gear it only does 9.3 mph.
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