HELP - vibration type noise

[92LittleRed]

Within the past week, I have noticed a vibrating type noise while driving my car. It only occurs when I accelerate from a dead stop and there is no noise upon deceleration. I tried listening to my car pretty closely in an attempt to isolate where the sound is coming from, but no luck. The other thing is that when I accelerate after I hit 35 - 40 mph, there is no vibrating noise.

The car has about 129600 miles on it and it is a convertible -- relatively new tires and brakes, new control arm, steering column and some other work was done about a year ago, but I can't remember the laundry list of things.

It's been suggested that it could be the center support bearing or the flex disc . . .

Any ideas, suggestions? I will be calling my mechanic soon, but wanted to try and get an sense of what could be going on, if possible.


Thanks!

 

[Kirby]

When you accelerate, things flex under the car in a particular direction, and flex the opposite way on decel, which usually explains why you get the vibration only on accel.

Yes, center bearing and flex disk are possibilities. Other possibilities, I assume it is coming from underneath the car, and not inside the car or under the hood:

- Exhaust pipe heat shield at Oxygen sensor rotted - just rip it off, it's not available as a replacement part, unless you replace the cat pipe. (common problem)
- Rear mounting holes for under car heat shield torn thru - reinforce with large washers
- Center exhaust mounting bracket rusted through where bracket attaches to pipe

(Ask me how I know about these problems, hehe)