Have Transmission Questions? Ask a Mechanic for Answers ASAP
Do you hear this noise just once or is it a repeating noise?
I will also need to know if your car is an awd or just front wheel drive please?
You may have a broken transmission mount or engine mount. Do you know how to test them?
Raise the hood so you can see the engine. Start the engine and put the transmission in drive. Set the parking brake and hold your left foot hard on the brake pedal so the car does not move. With your right foot slow add power to the engine and watch the engine and see if it lifts up on one side. It should move but only a little. If the engine does move a lot, then you have a broken engine mount. If the engine does not move, let off of the gas pedal real fast and see if you hear a clunk or the engine tilts front to back. If you hear a clunk, then one of the engine mounts are broken. Do the same test in revers and let me know what happens.