Today I attempted to change my pads and discs on my 159Ti, of course the pins on the Brembo's were stuck solid , I managed to loosen and get 3 of them out with the last still stuck in, to get them out I had to use some serious force with a punch and lump hammer, anyway I ran out of time to complete the job so put it all back together with 3 new pins in place of the old ones and headed to work, I now notice a bad vibration rumbling when lifting off the accelerator, get faster/slower to match your speed etc, when im on the gas its not that bad and hardly noticeable just when I lift off its pretty bad, have I somehow damaged something inside the driveshaft or gearbox or something from hitting the callipers that hard that I have somehow vibrated something loose????