Re: 1939 differential leak

Posted by TxGoat On 2023/5/23 21:45:39

It shouldn't leak after 5 K miles. Sometimes the surface the seal runs on is worn or pitted, which can damage the seal pretty quckly. Loose bearings or an out of balance driveshaft will shorten seal life. Another thing to check is the vent for the axle housing. Most all rear drive axles have some sort of vent to relieve pressure and allow moisture to escape. They can become clogged and allow pressure to build in the axle housing and force oil past even a good seal. Some vents are hard to find. Some are a drilled bolt with a little tin cap that doubles as a hold down bolt for the brake line junction block mounted on the axle housing.