Allis Chalmers 180 transmission question
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=134394
Printed Date: 07 Nov 2025 at 11:13am
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Topic: Allis Chalmers 180 transmission question
Posted By: keith wd
Subject: Allis Chalmers 180 transmission question
Date Posted: 28 Jan 2017 at 8:07pm
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Hi am working on are 180 and tractor jumps out of 4th gear and starting to take apart and wandering how hards is it to work on it and change the gear if any info will help.
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Replies:
Posted By: Allis dave
Date Posted: 28 Jan 2017 at 8:14pm
I've never done it, but here some reading to get you started.
http://www.allischalmers.com/forum/forum_posts.asp?TID=84862&title=usual-jumping-out-of-3rd-gear" rel="nofollow - http://www.allischalmers.com/forum/forum_posts.asp?TID=84862&title=usual-jumping-out-of-3rd-gear
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Posted By: skipwelte
Date Posted: 28 Jan 2017 at 9:27pm
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You can split the tractor between the eng and torque tube, remove the power director and remove 4th gear, usually if the splines on the gear are worn, the coupler is also worn and you have to remove the trans main shaft to get the coupler out. That intails removeing final drives, ring gear and press the main shaft reward-a lot of work. If there is to much end play on the gears on the main shaft you can install a thicker snap ring on the front of the main shaft and help the jumping out when going on a push. Ive also reground the shift detents on the shift rails to allow the coupler to slide deeper on the splines-helps to stay in gear and Ive made the detents deeper to make it harder to slip out of gear. Now if the splines on the gear are worn round and chipped-nothing will probably work except replacing parts. HTH
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Posted By: DSeries4
Date Posted: 29 Jan 2017 at 9:58am
Gear jumps are never an easy fix. Lots of work and lots of money on parts. I've had 3 transmissions done. Average is around $2000 in parts alone.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Posted By: DrAllis
Date Posted: 29 Jan 2017 at 1:23pm
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I've fixed a couple dozen One-Eighty's by a new deeper shift 3-4 rail, a new fork and double detent springs. All done by removing the shift cover.
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