Pulling Forum - 4th Gear in a 180

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4th Gear in a 180

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=206621
Printed Date: 08 May 2025 at 5:39pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 4th Gear in a 180

Posted By: KevinON
Subject: 4th Gear in a 180
Date Posted: 08 May 2025 at 7:21am

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.

Replies:

Posted By: tbran
Date 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.

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: DrAllis
Date Posted: 08 May 2025 at 11:31am

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.