A while back I started feeling a vibration at certain speeds under acceleration. This will come and go depending on temperature...wose when cold, almost non-existent when warmed-up. This is definately not related to tire balance, etc. Anyway, soon afterward a rythmic squeaking started and it directly correleated to the vibration I'm feeling.

I went and replaced the center carrier bearing myself taking care to mark and re-align everything the way it originally was. I also made sure to preload the carrier bearing when re-installing. Now the squeak is gone, but I still have that vibration.

I've have looked at this guibo a number of times hoping to see any evidence of cracking or notible failure, but I'm seeing nothing. Is it possible that perhaps the rubber has just gotten so hard that it's causing a vibration? Has anyone had a guibo go bad that didn't look bad?

Any help is greatly appreciated!

John