This is my first time writing on one of these forums. I have a 2006 v6 pony package. I recently upgraded my gears to the 4.10s and after installing them I've notice a difference in a good and bad way. My problem is that I've noticed a weird shaking while my car is stopped at a light and it makes a loud " hum " sound coming from the front/ middle of the car. I recently changed the transmission mount but that didn't change anything. So I don't know if it's the drive shaft U joints or something else. Can someone please help!?