As Title states, My half shafts started vibrating under acceleration, I replaced those and for maybe 1000 miles or a bit more, I fixed the vibrations. They slowly came back though. Recently I added half shaft spacers to hopefully help with the vibrations but these did not help at all. What is next to do?

 

What brand axles?

Axle spacers are all you need. Put the oem axles back in, with the spacers.

If the axles are aftermarket, they will vibrate.

Even better, to learn the car, put a spacer on the driver’s side only. It is always the first to develop the pit mark in the bucket. I have pulled many OEM axles to do the bucket swap. In all cases, the left was pitted, the right was not.

 

Duralast Gold CV axles from Auto Zone, they were the only ones I could afford that had some kind of warranty. I did the swap like 2 years ago and have since thrown the OEM ones away...yay. I do remember one side was def more pitted than the other.

I guess now I'm stuck.

 

Throwing away your worn out stock ones was huge mistake