help: scatching noise!

[palbuddy]

Whenever the rpm goes around 1500, noise would come into the driver's side. The noise is not the cricket sound when it idles. It sounds like two gears lightly scatching each other. It is doesn't intense, but it is really alarming, cuz it is a new problem. My car is 01 MP3 with merely 70 K miles, and I hope that it is just soemthing most cars would do as they get used. But it is not the clutch, I think. Even if I press the clutch down, the noise persists. No matter what you do, you can always hear it, idle, speeding up/down, clutch up/pressed, as long as it is 1500 rpm, no more no less, it would complain.

I opened the hood, and rev up the engine by hand, and I could barely hear anything weired. But if I sit in the car and press/release the gas, the noise is quite obvious.

It seems the culprit could be from under the car. Maybe the transmission. Here is my guess:

1. the gears got worn over the years and crumbles of metal mix with tranny oil. But I drained and filled the tranny oil only a year ago. And I used Castrol. The oil shouldn't have so much build-up.

2. Some parts are getting loose, and when the engine revs up, it would rattle.

3. welcome to Mazda's transmissioin.

Any experience/suggestion?

[crashkelly]

Whenever the rpm goes around 1500, noise would come into the driver's side. The noise is not the cricket sound when it idles. It sounds like two gears lightly scatching each other. It is doesn't intense, but it is really alarming, cuz it is a new problem. My car is 01 MP3 with merely 70 K miles, and I hope that it is just soemthing most cars would do as they get used. But it is not the clutch, I think. Even if I press the clutch down, the noise persists. No matter what you do, you can always hear it, idle, speeding up/down, clutch up/pressed, as long as it is 1500 rpm, no more no less, it would complain.

I opened the hood, and rev up the engine by hand, and I could barely hear anything weired. But if I sit in the car and press/release the gas, the noise is quite obvious.

It seems the culprit could be from under the car. Maybe the transmission. Here is my guess:

1. the gears got worn over the years and crumbles of metal mix with tranny oil. But I drained and filled the tranny oil only a year ago. And I used Castrol. The oil shouldn't have so much build-up.

2. Some parts are getting loose, and when the engine revs up, it would rattle.

3. welcome to Mazda's transmissioin.

Any experience/suggestion?

Well there is a high power magnet in your trans to snatch up any metal "filings" and what not so i doubt you are getting any rattle from that.

You probably just have something loose like you said, maybe the exhaust is rattling or something.

Youd probably get better input if you posted in the MP3 section...This is the MSP section.

[ChopstickHero]

it's most likely a heat shield rattling. go under the hood and tighten bolts on the exhaust manifold heat shield. or even the j-pipe heat shield.