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Axles do not usually cause this problem. Check the fluid level in the transmission. Low fluid could cause a whine and a slip as you are describing. Also check the fluid in the PTU. This is a common problem on the edge.
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There are teeth on the axle where it enters into the trans. If the axles teeth were stripped, the trans will need to be remove to fix. This may also cause the vehilce to slip and not want to move.
This is not a common problem.