one of the member here have this problem, it only happen ocassionally. hear spinning sound from the rear inside the car. even sometimes when the car stop or drive slow. what would the problem be?

 

could this be due to alignment? LSD Oil ran out? other?

 

Spinning almost like a whining?

 

nope i dun have navi.

its a spinning sound like Mobile phone vibration and electronic toy cars engine sound.

it normally appear 5 seconds + -

 

Spinners?

 

????? not my car
thats all i hear when i was in the car.

 

Hmm, its not a slight shudder, is it? I'm curious as to what this is.

 

Fuel pump? Headlight leveling?

 

definitely not a shudder, we were only manage to hear that sound after driving around for hours, and it only came out for less than 5 seconds.

i also suspect Fuel pump before, but why it was not there before and sound louder now? any idea bro?

 

do you have a manual? Is it your synchros and transmission spinning? If so it would be clearly audible when switching to first or second gears.

 

^^^ What he said. First thing I thought of was the sound the transmission makes when you're slowing down to stop at a light or whatnot and try to put it in first before you've stoped.

 

sorry but i am not a tech guy. what is synchros?

its not audible at any gear, it will appear when ever it want to.

 

Nope thats not the sound, its more obvious, clear and louder.

 

make an audio recording, otherwise all we can do is guess ..

 

Synchronizers
Manual transmissions in modern passenger cars use synchronizers to eliminate the need for double-clutching. A synchro's purpose is to allow the collar and the gear to make frictional contact before the dog teeth make contact. This lets the collar and the gear synchronize their speeds before the teeth need to engage, like this:

http://www.howstuffworks.com/transmission.htm


When pushing the clutch in and going to a lower gear when coasting you will hear the synchros working to speed up to the proper RPM before they actually engage the gear to the drive shaft.

 

It might be this: Secondary air injection pump. It provides air to the catalyst to limit emissions. It sounds as though it is located in the rear but it is actually under the hood (bonnet). When it starts to go, it makes a high pitched buzzing or whirring sound that sort of comes and goes.

 

Bro its an Auto.

 

Does this mean its ok?

 

It means that the next time you're in for servicing, tell the service writer about it. If I'm correct in identifying the sound, it's non-critical; just means it will take your catalytic converter a little longer to get to operating temperature. But then, I'm not an automotive technician and I'm not there to hear the actual noise.

 

thanks bro. i think i found the problem. it might be air inside fuel pump.

 

It would only take longer if his air pump stopped working all together, not if it came on randomly after the car is warmed up.

 

due to our oil pump is a in tank pump, so when low fuel, during cornerings, air would get into pump and make this noise. also at bumpy rides when fuel is not low. make sense cause the car was driven to a bumpy long distance road the same day. my question is why it happened to suck air after that? due to new fuel fomular that just been introduced?

 

The air pump only runs when the car is started cold...so it won't likely be that.

I would think in an Auto tranny uyou should let them have a look at it. There are a lot of valves and crap in there that can make noises.....

 

I also suspected the fuel pump, mine did the same, with full fuel or not,if you close windows and listen even when idle and you hear the spinning nearly as if it vibrates into the car body.
Then make ready for a soon to be replacing expensive fuel pump, it happened to me at only about 25000 miles

If it makes that noise in low fuel, i dont think its right, the pump casing or basket around it holds about a liter of fuel on its own if i am correct, so keep listening to the pump for a while, just in case.

Philip

 

It's probably the transmission. When you're driving slow, you gear less road/wind noise, your lower gears spin relatively fast and you hear it, not unlike the tranny sound when you reverse, no?