1947 c Loud whinning noise in rearend
Printed From: Unofficial Allis
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=37794
Printed Date: 06 Apr 2026 at 12:58am
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Topic: 1947 c Loud whinning noise in rearend
Posted By: craigreavley
Subject: 1947 c Loud whinning noise in rearend
Date Posted: 23 Sep 2011 at 1:34pm
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What would cause a loud whinning noise in the rearend of a C. It makes the noise in all gears, only when tractor is moving. Both sides are evenly loud all fluids are full. If you jack up one side and spin the wheel by hand it is heard as well.Everything works as it should it is just really loud in all gears. I have several Cs and there is always some gear noise but this one tractor is by far excessive. The noise seems to be coming from right at the center of where the two axles go into the center transmission.
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Replies:
Posted By: Gerald J.
Date Posted: 23 Sep 2011 at 1:58pm
Pinion to ring gear mesh, or bearings on pinion and differential, or all 6 (4 bearings, two gears).
Gerald J.
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Posted By: craigreavley
Date Posted: 23 Sep 2011 at 2:06pm
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I have another complete transmission and rear end for a c that is good. Is it easier to change rearend, or try to tear this one aprt and fix???
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Posted By: nsula_country
Date Posted: 23 Sep 2011 at 2:37pm
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My Farmall 504 has sounded like that for more than 10 years. I think it is called wear. So far it is not noticeably worse from one use to the next. Also it is a constant sound, not like broken teeth.
CT
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2014 LS P7010C, 1962 Farmall 504 Diesel (1st tractor) w/ 2008 Koyker 220 FEL, 1968 Allis Chalmers 180 Diesel, Komatsu PC38UU-2 Excavator, Various attachments for all!
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Posted By: Thad in AR.
Date Posted: 23 Sep 2011 at 7:31pm
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My C has a similar noise. It stops when the clutch is in and everything stops turning. It does it in neutral also but gets worse the higher gear you're in. Third is terrible. I believe mine is in the trans since it does it in neutral.
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