I am using a new laptop that is a real pile. Among its numerous design flaws, it does not play sound from the internet.
If you can hear the noise while standing beside the car, it is not related to the transmission, so that is a big worry eliminated. I do not know that it is necessary to tow the car. The types of things I would be looking for include an exhaust pipe that got pushed on by the hoist, or even a rubber exhaust hanger that was real close to breaking anyway, and the hoist moving on it was the final blow. That can let the whole system hang a little lower, and that can open up the flexible joint I mentioned. The clue is the noise will get louder when you press the accelerator pedal to speed up the engine, and that will be worse if you do that while holding the brakes applied. If nothing else works out, have the car inspected at a tire and alignment shop. The people there are experts at finding the causes of noises and vibrations, as well as poor tire wear. Specific to this issue is the need to determine if you are hearing a noise that is not normal for this model, meaning something is wrong or broken, or if you're hearing a noise too easily that is otherwise characteristic for your model, meaning something is mispositioned or missing. Be aware too that exhaust parts are suspended on rubber hangers to isolate the noise and vibration from the passenger compartment. It does not take much to allow two metal parts of a bracket to rub against each other. You'd be amazed at how much noise that can produce that is not heard outside the car.
Given the age of the car, metal fatigue can also play a role in how quiet it is inside. Regular hoists raise the car by its designed-in lifting points, and those are different than when the tires and suspension system hold the car up. It is not unheard of for the body to flex to the point a door weatherstrip seal leaves a gap. That will allow you to hear road noise which can be very noticeable. The body will usually settle back to where it was, but sometimes not right away. Also, GM engines are well-known to be noisy, especially their four-cylinder engines. A lot of effort went into adding noise-deadening materials. If any of that becomes non-functional, you'll hear the same noise a lot of other drivers hear. That includes the rubber seal that runs along the bottom of the rear edge of the hood.
I have to add one comment of value. I taught over one hundred students in a community college automotive program. Three of my top people were girls, and the guys had a lot of respect for them. A real lot of men today are just as clueless about the machines they trust are going to get them back home, and when you talk with the service writers behind the customer counter, they do not know where you fit on that scale of automotive wisdom. Some of those service writers are washed-out mechanic wanted-to-be's, but could not make it. My last supervisor at school was a woman who was a former service manager at a new-car dealership, and she was real good at her job. Also, during my ten years working at a real nice family-owned Chrysler dealership, I got to attend a lot of their schools, and they used my classroom as one of their three remote training locations, so I got to sit in on those too after I started teaching. The head of all of Chrysler training for all of Wisconsin and part of Michigan was a woman, and her classes were some of the best I have ever attended. So, you are welcome to be a woman, but you cannot assume anything about anyone when it comes to cars today. What you need to work toward is finding a shop or mechanic you feel comfortable with, then build a relationship with them. Any shop is better able to address your concerns when they know the history of your car. We had a real lot of regular, repeat customers at the dealership, and I often saw the same cars over and over for all of their regular maintenance. We got to know what types of things the owners would want to be told about, and what we could safely ignore. We have about a dozen new-car dealers in my city with the same excellent reputation. There is only one Chevrolet dealer that is a well-known crook. We used to have one really bad independent shop owner, but he ran out of customers and is no longer in business.
Keep my informed as to your progress or if you need more words of wisdom!
Friday, May 5th, 2017 AT 8:49 PM