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Tom Endy · 10-20-2019, 04:16 PM

I had a job a while back where the failure mode was the gear end of an original axle shaft sheared where the gear attached to the shaft. There were actually two failure modes. Years before the differential had been overhauled by someone who did not understand carrier pre-load. When the car was back on the road the rear was locked. Henry's 40 horses broke it loose. Usually it does so by spinning the carrier bearings on the mounting hubs. In this case it was locked so tight that it sheared the hub on the ring side of the carrier. The car operated like this for about 8 years before the heat cycling finally got to the axle shaft and the left axle shaft sheared right at the gear next to the sheared carrier hub.

See the attached link for photos.

Tom Endy

http://www.santaanitaas.org/wp-conte...ilure-2018.pdf

10-20-2019, 04:16 PM	#23
Tom Endy Senior Member Join Date: May 2010 Location: Southern California Posts: 3,131	Re: Why did my axle break? I had a job a while back where the failure mode was the gear end of an original axle shaft sheared where the gear attached to the shaft. There were actually two failure modes. Years before the differential had been overhauled by someone who did not understand carrier pre-load. When the car was back on the road the rear was locked. Henry's 40 horses broke it loose. Usually it does so by spinning the carrier bearings on the mounting hubs. In this case it was locked so tight that it sheared the hub on the ring side of the carrier. The car operated like this for about 8 years before the heat cycling finally got to the axle shaft and the left axle shaft sheared right at the gear next to the sheared carrier hub. See the attached link for photos. Tom Endy http://www.santaanitaas.org/wp-conte...ilure-2018.pdf