Why does axle shaft keep coming out?

An axle shaft may keep coming out due to several factors, including worn or damaged retaining clips, improper installation, or excessive wear on the splines or housing. Additionally, a lack of lubrication or misalignment in the axle assembly can contribute to the issue. If the differential bearings are worn, they can also cause movement that dislodges the axle shaft. Regular inspection and maintenance can help identify and resolve these issues before they lead to repeated problems.