Good evening GAZZUZZ.
My car had an accident Jly last year. The back left job was affected. It was fixed and had to be fixed again March this year as the sound came up again. The mechanic told me the oil in the back axle was leaking and had to be topped.
However, another sound came up on the back wheel on the right side and he says the axle needs to be changed.

1). Please how certain can I be that the axle is indeed the problem?

2). Can the seal of the axle be fixed? Would that sort out the problem of the sound being heard?

3). Would the axle still get bad or pack up even if the seal is fixed?

4). And how much do you estimate that I would have to spend to fix it.

Thank you.