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KevinON 
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Joined: 07 Dec 2009
Location: Schomberg, ON
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 Topic: 4th Gear in a 180
Posted: 08 May 2025 at 7:21am |
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Just wondering if anyone could tell me what the tooth count should be on 4th gear (input shaft) on a 180/185? I have two transmissions, and one gear has 36 teeth and the other gear has 42 teeth. Thanks.
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tbran
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Joined: 14 Sep 2009
Location: Paris Tn
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Posted: 08 May 2025 at 10:33am |
70256571 19 tooth with 15 coupling teeth. The only one I know of on a 180
70245780 20 tooth 20 coupling - first 190 70245722 19 tooth 70246407 19 with 12 coupling look on the input gear to see if there is a snap ring groove cut in - if so it is a D series.
Edited by tbran - 08 May 2025 at 10:39am
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When told "it's not the money,it's the principle", remember, it's always the money..
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DrAllis
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Joined: 12 Sep 2009
Points: 22091
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Posted: 08 May 2025 at 11:31am |
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If you have 36 and 42 teeth on the input shaft to the transmission (direct drive/4th gear) it is custom made. They are usually two parts: a gear (36 or 42) and an input shaft with splines and a snap ring groove to hold on the gear on those splines. A gear that large will not fit thru the input shaft bearing hole in the trans case. A gear that large is assembled from the rear being slid onto the input shaft while the shaft is being installed into the trans case from the front.
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KevinON
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Joined: 07 Dec 2009
Location: Schomberg, ON
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Posted: 08 May 2025 at 8:06pm |
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I’m trying to attach a photo of the gear, but the file size is too big
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Ed (Ont)
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Joined: 08 Nov 2009
Location: New Lowell, Ont
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Posted: 13 May 2025 at 4:21pm |
 This is medium size.
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Ed (Ont)
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Posted: 13 May 2025 at 4:25pm |
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Kevin I will post a couple pics here that may help you!
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Ed (Ont)
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Posted: 13 May 2025 at 4:26pm |
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Ed (Ont)
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Posted: 13 May 2025 at 4:28pm |
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Ed (Ont)
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Posted: 13 May 2025 at 4:29pm |
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Ed (Ont)
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Posted: 13 May 2025 at 4:33pm |
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Look at top pic. See where it says actual size at bottom of pic. Tap that and it will give you the choices you see in middle pic. Choose medium and use that. I find that I usually try twice to get it to load.
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Ed (Ont)
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Posted: 13 May 2025 at 4:38pm |
Do you have some young kids hanging around. They will walk you thru it. Keep in mind I am doing this on my iPad. Apple format. PC format gonna be bit different. But again some young kid can help. Or Jay!! 
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