Hey,
I need some ideas everyone. I've had the car into two different shops trying to figure out what this noise is - we can find anything definitive.
I'll try to describe it:
- It can only be heard while driving the car (weight on wheels).
- It appears to be coming from the front left.
- It sounds just like Zoidberg's whoop whoop whoop
- It's most audible in 1st, 2nd, 3rd (1st is loudest, then 2nd, then 3rd)
- The noise doesn't really start until ~2500 RPM in each gear. As rpm increases, the noise grows louder and increases in frequency until about 3000 RPM
- After 3000RPM, either the noise starts to quiet down, or the engine is now too loud and drowns it out, I can't really tell.
_ If I hold the car at the speed/RPM which produces the loudest noise (around 2600-2700RPM), I can change the volume of the noise by lightly and slightly pulsing the throttle by a couple mm or so.
- While doing so, the noise is louder while on power, and quiets down when I back off a tad (while trying to maintain that same speed/RPM).
- It seems louder when going up hill in that rpm range, and quieter while going downhill in that rpm range.
OKay, here is some background info.
205 Tranny. I've put nearly 50K km on it.
While in the shops, we checked wheel bearings by tilting/twisting wheels and with a stethoscope while on the lift with wheels spinning in the RPM range.
No evidence of worn bearings and we heard nothing with the stethoscope when placed on the knuckles.
The Front Left Inner CV boot has had a zap strap on it since before I owned the car. It's recently been replaced with a proper metal band and more grease added to the boot - no change to noise.
Now, I'd really like your thoughts on this finding:
With the stethoscope placed on the bottom of the tranny near the front left driveshaft, a very audible, constant groan can be heard.
When I listened to the noise, it didn't sound anything like the noise I was hearing while driving the car. Do normal gear sets make any noise at all?
Could this really be the source? Perhaps the noise changes and becomes audible while the wheels and tranny are loaded?
What is in the tranny near this location which could produce that noise?
Is it possible the inner front left CV is causing the noise? Keep in mind the boot had a zap strap on it and I have no record on whether it's been replaced, or if the boot had been torn and replaced....
Any help is greatly appreciated. This is starting to drive me nuts!
I need some ideas everyone. I've had the car into two different shops trying to figure out what this noise is - we can find anything definitive.
I'll try to describe it:
- It can only be heard while driving the car (weight on wheels).
- It appears to be coming from the front left.
- It sounds just like Zoidberg's whoop whoop whoop
- It's most audible in 1st, 2nd, 3rd (1st is loudest, then 2nd, then 3rd)
- The noise doesn't really start until ~2500 RPM in each gear. As rpm increases, the noise grows louder and increases in frequency until about 3000 RPM
- After 3000RPM, either the noise starts to quiet down, or the engine is now too loud and drowns it out, I can't really tell.
_ If I hold the car at the speed/RPM which produces the loudest noise (around 2600-2700RPM), I can change the volume of the noise by lightly and slightly pulsing the throttle by a couple mm or so.
- While doing so, the noise is louder while on power, and quiets down when I back off a tad (while trying to maintain that same speed/RPM).
- It seems louder when going up hill in that rpm range, and quieter while going downhill in that rpm range.
OKay, here is some background info.
205 Tranny. I've put nearly 50K km on it.
While in the shops, we checked wheel bearings by tilting/twisting wheels and with a stethoscope while on the lift with wheels spinning in the RPM range.
No evidence of worn bearings and we heard nothing with the stethoscope when placed on the knuckles.
The Front Left Inner CV boot has had a zap strap on it since before I owned the car. It's recently been replaced with a proper metal band and more grease added to the boot - no change to noise.
Now, I'd really like your thoughts on this finding:
With the stethoscope placed on the bottom of the tranny near the front left driveshaft, a very audible, constant groan can be heard.
When I listened to the noise, it didn't sound anything like the noise I was hearing while driving the car. Do normal gear sets make any noise at all?
Could this really be the source? Perhaps the noise changes and becomes audible while the wheels and tranny are loaded?
What is in the tranny near this location which could produce that noise?
Is it possible the inner front left CV is causing the noise? Keep in mind the boot had a zap strap on it and I have no record on whether it's been replaced, or if the boot had been torn and replaced....
Any help is greatly appreciated. This is starting to drive me nuts!