I Had some work done to my car, new camshaft and tune and they had to pull the tranny to replace a seal that was leaking. I don’t know if it’s from that or the tune but there’s more vibration from the tranny under the armrest/ cupholder
I feel it more when the car is in drive, the faster I go and the higher it revs.
It almost feels like something is tight. Any ideas what could be causing this!
Thank you

 

Maybe the exhaust is loose?

 

Check for something hitting the Body like the exhaust! If the mount was replaced with a aftermarket piece.....Get a GM mount! Also check the Torque Arm Mount.

 

Did you replace the transmission mount ?

 

The tuner had to increase the lock up speed and take away soft apply on lockup to minimize bucking and that’s creating this vibration