My 2013 ram hemi is in the shop. I brought it in for an oil change and they said they had to keep it for a master cylinder leak. I didn't even realize anything was wrong. Brakes were working just fine. I have this annoying vibration at 65+mph but the brakes I thought were great. Thanks for the warranty but still annoying to have a rental...

Anything I should look for as a result of something like this?