vibration at idle

[solrac6262]

hello all,

recently I had my car at the stealer because my transmission shifting is hard rough, like always everything was "fine" I told the tech that a couple of weeks before I had reset the memory and shifting was better, he said he was going to reset the thing again using his software since what I did doesn't erased completely all the memory .
I said fine

after that a couple days later, I noticed when I'm at idle, I can barely hear like a buzzing sound also little bit of vibration on my steering wheel, the noise you can barely hear it, but gets to the point that my ears bother me..

anyone having similar problems?? light vibration on steering wheel at idle, not on park.

thanks