[timgco]

Things to check:
* Make sure your spring seats are in properly and new coils are seated entirely.
* Did your tires get switched maybe? It could be that they were swapped and uneven tire wear could casue the vibration when switching sides? not sure, but popped into my head.


That's all I can think of. Pleanty of people have swapped without issue, so if it is related to your swap, I bet it's one of the things mentioned above.